C Language Programming Solution's

  1. C Language Boilerplate 
    #include<stdio.h>
int main()
{
	printf("Hello World");
	return 0;
}
/*
Output:
Hello World
*/
  2. Print Ascii Value Of A Character 
    #include<stdio.h>
int main()
{
	char c;
	printf("Enter A Character:\n");
	scanf("%c", &c);
	printf("The Ascii Value Of %c Is: %d", c, c);
	return 0;
}
/*
OutPut:
Enter A Character:
A
The Ascii Value Of A Is: 65
*/
  3. Sum Of Two Number's Without Input 
    #include<stdio.h>
int main()
{
	int a=10, b=20, sum;
	sum=a+b;
	printf("The Sum Of Two Number's is: %d", sum);	
	return 0;
}
/*
Output:
The Sum Of Two Number's is: 30
*/
  4. Sum Of Two Number's With User Input 
    #include<stdio.h>
int main()
{
	int a, b, sum;
	printf("Enter Two Number's:\n");
	scanf("%d %d", &a, &b);
	sum=a+b;
	printf("The Sum Of Two Number's is %d ", sum);    
	return 0;
}
/*
Output:
Enter Two Number's:
4
5
The Sum Of Two Number's is 9 
*/
  5. Multiplication of Two Number's 
    #include<stdio.h>
int main()
{
	int a=5, b=4, mul;
	mul=a*b;
	printf("The Multiplication Of Two Number's is %d ", mul);    
	return 0;
}
/*Output:
The Multiplication Of Two Number's is 20 
*/
  6. Multiplication of Two Number's With User Input 
    #include<stdio.h>
int main()
{
	int a, b, mul;
	printf("Enter Two number's: \n");
	scanf("%d %d", &a, &b);
	mul=a*b;
	printf("The Multiplication Of Two Number's Is: %d", mul);    
	return 0;
}
/*
Output:
Enter Two number's: 
4
5
The Multiplication Of Two Number's Is: 20
*/
  7. Area Of circle Using C Programming 
    #include<stdio.h>
int main()
{
    float area, r, PI=3.14;
    printf("Enter Radius Of Circle: \n");
    scanf("%f", &r);
    area=PI*r*r;
    printf("The Area Of Circle Is: %f ", area);    
    return 0;
}
/*
Output:
Enter Radius Of Circle: 
7
The Area Of Circle Is: 153.860016 
*/
  8. Aera Of Rectangle Using C Programming 
    #include<stdio.h>
int main()
{
    int l, b, area;
    printf("Enter The Length Of Rectangle:\n");
    scanf("%d", &l);
    printf("Enter The Breadth Of Rectangle: \n");
    scanf("%d", &b);
    area=l*b;
    printf("The area of Rectangle is: %d", area);    
    return 0;
}
/*
Output:
Enter The Length Of Rectangle:
4
Enter The Breadth Of Rectangle: 
5
The area of Rectangle is: 20
*/
  9. Swapping Value Using C Programming 
    #include<stdio.h>
int main()
{
	int x = 10, y = 15, temp;
	printf("Value Before Swapping x=%d and y=%d\n", x, y);
	temp = x;
	x = y;
	y = temp;
	printf("Value After Swapping x = %d and y = %d", x, y);
	return 0;    
}
/*
Output:
Value Before Swapping x=10 and y=15
Value After Swapping x = 15 and y = 10
*/
  10. Program To Find Input Number Is Odd Or even 
    #include<stdio.h>
int main()
{
    int a;
    printf("Enter A Number:\n");
    scanf("%d", &a);
    if(a%2==0){
        printf("The Input Number Is Even.");
    }
    else{
        printf("The Input Number Is Odd.");
    }
    return 0;
}
/*
Output:
Enter A Number:
5
The Input Number Is Odd.
*/
  11. Program To Find a Input Number Is Divisible By 5 
    #include<stdio.h>
int main()
{
    int a;
    printf("Enter A Number:\n");
    scanf("%d", &a);
    if(a%5==0){
        printf("The Number %d Is Divisible By 5", a);
    }
    else{
        printf("The Number %d Is Not Divisible By 5", a);
    }
    return 0;
}
/*
Output:
Enter A Number:
25
The Number 25 Is Divisible By 5
*/
  12. Find The Greatest Number Among 3 Numbers 
    
#include<stdio.h>
int main()
{
	int a, b, c;
	printf("Enter 3 Number's:\n");
	scanf("%d %d %d", &a, &b, &c);
	if(a>b && a>c){
		printf("The %d is Greatest Number.", a);
	}    
	else if(b>a && b>c){
		printf("The %d is Greatest Number.", b);
	}
	else{
		printf("The %d is Greatest Number.", c);
	}
	return 0;
}
				
/*
Output:
Enter 3 Number's:
7
1
2
The 7 is Greatest Number.
*/
  13. Find Middle Number Among 3 Number's 
    #include <stdio.h>

int main()
{
    int a,b,c;
    printf("Enter three numbers\n");
    scanf("%d %d %d",&a,&b,&c);

    if(b>a && a>c || c>a && a>b){
        printf("\n%d is a middle number",a);
    }


    if(a>b && b>c || c>b && b>a){
        printf("\n%d is a middle number",b);
    }

    if(a>c && c>b || b>c && c>a){
        printf("\n%d is a middle number",c);
    }
    return 0;
}
/*
Output:
Enter three numbers
5
6
7

6 is a middle number
*/
  14. Find Smallest Number Among 3 Numbers 
    
	#include<stdio.h>
int main()
{
    int a, b, c;
    printf("Enter 3 Number's:\n");
    scanf("%d %d %d", &a, &b, &c);
    if(a<b && a<c){
        printf("The %d is Smallest Number.", a);
    }    
    else if(b<a && b<c){
        printf("The %d is Smallest Number.", b);
    }
    else{
        printf("The %d is Smallest Number.", c);
    }
    return 0;
}
  15. Program To Check Input Character Is Vowel Or Not 
    					
#include<stdio.h>
int main()
{

	char ch;
	printf("Input a Character :  ");
	scanf("%c", &ch);
	
	switch(ch)
		{
			case 'a':
			case 'A':
			case 'e':
			case 'E':
			case 'i':
			case 'I':
			case 'o':
			case 'O':
			case 'u':
			case 'U':
				printf("\n\n%c is a vowel.\n\n", ch);
			break;
			default:
				printf("%c is not a vowel.\n\n", ch);
			}
								
		return 0;
	}
/*
	Output:
	Input a Character :  A
	A is a vowel.
*/
  16. Basic While Loop Program For Print 1--10 
    #include<stdio.h>
int main()
{
	int a;
	while (a<10)
		{
			printf("%d\t", a);
			a++;
		}					
	return 0;
}
/*
Output:
0       1       2       3       4       5       6       7       8       9
*/
  17. Basic Do-While Loop For Print 10-0 
    #include<stdio.h>
int main()
{
	int c=10;
		do
			{
				printf("%d\t", c);
				c=c-1;
			} while (c>0);				
	return 0;
}
/*
Output:
10      9       8       7       6       5       4       3       2       1
*/
  18. Program To Find Factorial using For Loop 
    #include<stdio.h>
int main()
{
	int fact, i, n;
	fact = 1;
	printf("Enter the number:\n");
	scanf("%d" , &n);
	for(i = 1; i <= n; i++)
	{
		fact = fact*i;
	}
	printf("Factorial of %d is %d", n , fact);
	return 0;
}
/*
Output:
Enter the number:
5
Factorial of 5 is 120
*/
  19. Nested For Loop Simple Program to Simple Pattern 
    #include<stdio.h>
int main()
{
	int i, j;
	for(i=0;i<=5;i++){
		for(j=0;j<=i;j++){
			printf("*");
		}
		printf("\n");
	}
	return 0;
}
/*
Output:
*
**
***
****
*****
******
*/
  20. Average Of 5 Numbers Using C Programming 
    #include<stdio.h>
int main()
{
	int a, b, c, d, e;
	float avg;
	printf("Enter 5 Number's :\n");
	scanf("%d %d %d %d %d", &a, &b, &c, &d, &e);
	avg=(a+b+c+d+e)/5;
	printf("The Average Of 5 Number's is: %f", avg);
	return 0;
}/*
Output:
Enter 5 Number's :
1
2
3
5
4
The Average Of 5 Number's is: 3.000000
*/
  21. Print Multipication Table Of Any Number 
    #include <stdio.h>
int main() {
  int n, i;
  printf("Enter an integer: ");
  scanf("%d", &n);
  for (i = 1; i <= 10; ++i) {
    printf("%d * %d = %d \n", n, i, n * i);
  }
  return 0;
}
/*
Output:
Enter an integer: 6
6 * 1 = 6 
6 * 2 = 12
6 * 3 = 18
6 * 4 = 24
6 * 5 = 30
6 * 6 = 36
6 * 7 = 42
6 * 8 = 48
6 * 9 = 54
6 * 10 = 60
*/
  22. Sum Of N Number's Using C Programming 
    #include <stdio.h>
int main() {
    int n, i, sum = 0;

    printf("Enter A integer: ");
    scanf("%d", &n);

    for (i = 1; i <= n; ++i) {
        sum += i;
    }

    printf("Sum of 0 from %d Is: %d",n, sum);
    return 0;
}
/*
Output:
Enter A integer: 5
Sum of 0 from 5 Is: 15
*/
  23. Program in C To Find That The Weather Number Is Palindrome or not 
    #include <stdio.h>
int main() {
  int n, reversed = 0, remainder, original;
    printf("Enter an integer: ");
    scanf("%d", &n);
    original = n;

    while (n != 0) {
        remainder = n % 10;
        reversed = reversed * 10 + remainder;
        n /= 10;
    }

    if (original == reversed)
        printf("%d is a palindrome.", original);
    else
        printf("%d is not a palindrome.", original);

    return 0;
}
/*
Output:
Enter an integer: 101
101 is a palindrome.
*/
  24. C Programming To Find Average Using Array 
    #include <stdio.h>
int main()
{
     int marks[10], i, n, sum = 0, average;

     printf("Enter number of elements: ");
     scanf("%d", &n);

     for(i=0; i<n; ++i)
     {
          printf("Enter number%d: ",i+1);
          scanf("%d", &marks[i]);
          
          sum += marks[i];
     }

     average = sum/n;
     printf("Average = %d", average);

     return 0;
}
/*
Output:
Enter number of elements: 5
Enter number1: 1
Enter number2: 2
Enter number3: 3
Enter number4: 4
Enter number5: 5
Average = 3
*/
  25. Find The Variable Address Using Pointer 
    #include <stdio.h>
int main()
{
  int Variable = 15;
  printf("Variable: %d\n", Variable);

  printf("address of Variable: %p", &Variable);  
  return 0;
}
/*
Output:
Variable: 15
address of Variable: 000000000062FE1C
*/
  26. C Program To Take Input Name and Print That 
    #include <stdio.h>
int main()
{
    char name[20];
    printf("Enter name: ");
    scanf("%s", name);
    printf("Your name is %s.", name);
    return 0;
}
/*
Output:
Enter name: Tech 
Your name is Tech.
*/
  27. Find The Length Of String Using strlen() Function In C 
    #include <stdio.h>
#include <string.h>
int main()
{
  char a[100];
  int length;

  printf("Enter a string: \n");
  gets(a);

  length = strlen(a);

  printf("Length of the string = %d\n", length);

  return 0;
}
  28. Concatenates Two Strings using strcat() Function 
    #include <stdio.h>
#include <string.h>
int main() {
   char str1[100] = "C Programming ", str2[] = "Language";
   strcat(str1, str2);
   puts(str1);
   return 0;
}
/*
Output:
C Programming Language
*/
  29. Compare Two Strings Using strcmp() Function 
    #include<stdio.h>
#include<string.h>
int main()
{
    char a[100], b[100];    
    printf("Enter the first string\n");    
    gets(a);    
    printf("Enter the second string\n");    
    gets(b);
    if( strcmp(a,b) == 0 )
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");
	return 0;
}
/*
Output:
Enter the first string
Programming
Enter the second string
Programming
Entered strings are equal.
*/
  30. Convert Uppercase String using strlwr() Function 
    #include<stdio.h>
#include<string.h>
int main()
{
   char s[100];
   printf("Enter a string in Uppercase: ");
   scanf("%[^\n]",s);
   printf("In Lower Case:\n");
   puts(strlwr(s));
   return 0;
 }
/*
Output:
Enter a string in Uppercase: PROGRAMMING
In Lower Case:
programming
 */
  31. Convert Lowercase String Into Uppercase String Uisng strupr() Function 
    #include<stdio.h>
#include<string.h>
int main()
{
   char s[100];
   printf("Enter a string in Lowercase: ");
   scanf("%[^\n]",s);
   printf("In Uppercase Case:\n");
   puts(strupr(s));
   return 0;
 }
/*
Output:
Enter a string in lowercase: programming
In Uppercase Case:
PROGRAMMING
*/
  32. Reverse A String Using C Programming 
    #include <stdio.h>
#include <string.h>
#define MAX_SIZE 100 

int main()
{
    char str[MAX_SIZE];

    printf("Enter any string: ");
    gets(str);

    printf("Original string = %s\n", str);

    strrev(str);
    printf("Reverse string = %s", str);

    return 0;
}
/*
Output:
Enter any string: Hello
Original string = Hello
Reverse string = olleH
*/
  33. Check The String Is Palindrome Or Not Using C Programing 
    
#include <stdio.h>
#include <string.h>

#define MAX_SIZE 100 

int main()
{
    char str[MAX_SIZE], reverse[MAX_SIZE];
    int flag;

    printf("Enter any string: ");
    gets(str);


    strcpy(reverse, str); 
    strrev(reverse);      

    flag = strcmp(str, reverse); 

    if(flag == 0)
    {
        printf("String is Palindrome.");
    }
    else
    {
        printf("String is Not Palindrome.");
    }

    return 0;
}
/*
Output:
Enter any string: mam 
String is Palindrome.
*/
  34. Create a Txt file and Save Details Of A Person 
    #include<stdio.h>
int main()
{
    FILE *fptr;
    char name[20];
    int age;
    float salary;

    fptr = fopen("details.txt", "w");

    if (fptr == NULL)
    {
        printf("File does not exist.\n");
        return;
    }
    printf("Enter the name:\n");
    scanf("%s", name);
    fprintf(fptr, "Name  = %s\n", name);

    printf("Enter the age:\n");
    scanf("%d", &age);
    fprintf(fptr, "Age  = %d\n", age);

    printf("Enter the salary:\n");
    scanf("%f", &salary);
    fprintf(fptr, "Salary  = %.2f\n", salary);

    fclose(fptr);
    return 0;
}
/*Output:
details.txt Will be created and ask for some details
Enter the name:
John
Enter the age:
27
Enter the salary:
26000

this details will be saved on details.txt file in that format
Name  = John
Age  = 27
Salary  = 26000.00
*/
  35. Length Conversion Using c Pogramming (Centimerter To Meter and KiloMeter) 
    #include <stdio.h>

int main()
{
    float cm, meter, km;

    printf("Enter length in centimeter: ");
    scanf("%f", &cm);

    meter = cm / 100.0;
    km    = cm / 100000.0;

    printf("Length in Meter = %f m \n", meter);
    printf("Length in Kilometer = %f km", km);

    return 0;
}
/*
Output:
Enter length in centimeter: 1000
Length in Meter = 10.000000 m 
Length in Kilometer = 0.010000 km
*/
  36. Find The Power Of Any Number 
    #include <stdio.h>
#include <math.h>

int main()
{
    int base, expo, power;

    printf("Enter base: ");
    scanf("%d", &base);
    printf("Enter exponent: ");
    scanf("%d", &expo);

    power = pow(base, expo);

    printf("%d ^ %d = %d", base, expo, power);

    return 0;
}
/*
Output:
Enter base: 2
Enter exponent: 2
2 ^ 2 = 4
*/
  37. Find The Square Root of Any Number 
    #include <stdio.h>
#include <math.h>

int main()
{
    float num, root;

    printf("Enter any number to find square root: ");
    scanf("%f", &num);

    root = sqrt(num);

    printf("Square root of %.2f = %.2f", num, root);//%.2f is used for 2 numbers after decimal

    return 0;
}
/*
Output:
Enter any number to find square root: 100
Square root of 100.00 = 10.00
*/
  38. C Program to Find Simple Interest 
    #include <stdio.h>
int main()
{
    float principle, time, rate, SI;

    printf("Enter principle (amount): ");
    scanf("%f", &principle);

    printf("Enter time: ");
    scanf("%f", &time);

    printf("Enter rate: ");
    scanf("%f", &rate);
    SI = (principle * time * rate) / 100;
    printf("Simple Interest = %.2f", SI);
    return 0;
}
/*
Output:
Enter principle (amount): 100000
Enter time: 1
Enter rate: 20
Simple Interest = 20000.00
*/
  39. C Program To Check The Weather Year Is Leap Year Or not 
    #include <stdio.h>
int main() {
   int year;
   printf("Enter a year: ");
   scanf("%d", &year);

   if (year % 400 == 0) {
      printf("%d is a leap year.", year);
   }

   else if (year % 100 == 0) {
      printf("%d is not a leap year.", year);
   }

   else if (year % 4 == 0) {
      printf("%d is a leap year.", year);
   }
   else {
      printf("%d is not a leap year.", year);
   }

   return 0;
}
/*
Output:
Enter a year: 2016
2016 is a leap year.
*/
  40. C Program To Check Alphabet or not 
    #include<stdio.h>
int main()
{
  char ch;
  printf("Enter A Character:\n");
  scanf("%c", &ch);

  if((ch>='a' && ch<='z') ||(ch>='A' && ch<='Z')){
    printf("This is an alphabet");
  } 
  else{
      printf("This is Not Alphabet");
  }
  return 0;
}
/*
Output:
Enter A Character:
a
This is an alphabet
*/
  41. C Program to print the day of week Using Switch-Case 
    #include <stdio.h>
int main()
{
    int week;
    printf("Enter week number(1-7): ");
    scanf("%d", &week);
    
    switch(week)
    {
        case 1: 
            printf("Sunday");
            break;
        case 2: 
            printf("Monday");
            break;
        case 3: 
            printf("Tuesday");
            break;
        case 4: 
            printf("Wednesday");
            break;
        case 5: 
            printf("Thursday");
            break;
        case 6: 
            printf("Friday");
            break;
        case 7: 
            printf("Saturday");
            break;
        default: 
            printf("Invalid input! Please enter week number between 1-7.");
    }
    return 0;
}
/*
Output:
Enter week number(1-7): 4
Wednesday
*/
  42. C Program to Print All Alphabets from a-z 
    #include<stdio.h>
int main()
{
    char ch;

    printf("Alphabets from a - z are: \n");
    for(ch='a'; ch<='z'; ch++)
    {
        printf("%c\t", ch);
    }

    return 0;
}
/*
Output:
Alphabets from a - z are: 
a       b       c       d       e       f       g       h       i       j       
k       l       m       n       o       p       q		r       s       t       
u       v       w       x       y       z
*/
  43. C Program To Print Even Number's from 0 To N 
    #include<stdio.h>
int main()
{
    int i, n;
  
    printf("Print all even numbers till: ");
    scanf("%d", &n);

    printf("Even numbers from 1 to %d are: \n", n);

    for(i=1; i<=n; i++)
    {
        if(i%2 == 0)
        {
            printf("%d\n", i);
        }
    }

    return 0;
}
/*
Output:
Print all even numbers till: 10
Even numbers from 1 to 10 are: 
2
4
6
8
10
*/
  44. C Program To Print Even Number's from 0 To N 
    #include<stdio.h>
int main()
{
    int i, n;
  
    printf("Print all even numbers till: ");
    scanf("%d", &n);

    printf("Even numbers from 1 to %d are: \n", n);

    for(i=1; i<=n; i++)
    {
        if(i%2!= 0)
        {
            printf("%d\n", i);
        }
    }

    return 0;
}
/*
Output:
Print all even numbers till: 10
Even numbers from 1 to 10 are: 
1
3
5
7
9
*/
  45. C Program To Print Multiplication Table of Any Number 
    #include <stdio.h>
int main()
{
    int i, num;

    printf("Enter number to print table: ");
    scanf("%d", &num);

    for(i=1; i<=10; i++)
    {
        printf("%d * %d = %d\n", num, i, (num*i));
    }

    return 0;
}
/*
Output:
Enter number to print table: 6
6 * 1 = 6
6 * 2 = 12
6 * 3 = 18
6 * 4 = 24
6 * 5 = 30
6 * 6 = 36
6 * 7 = 42
6 * 8 = 48
6 * 9 = 54
6 * 10 = 60
*/
  46. C Program to find a number is negative, Zero(0) and Positive 
    #include<stdio.h>
int main()
{
    int n;
    printf("Enter A Number:\n");
    scanf("%d", &n);
    if(n<0){
        printf("%d Is Negative", n);
    }    
    else if(n==0){
        printf("%d is Zero(0)", n);
    }
    else{
        printf("%d Is Positive", n);
    }
    return 0;
}
/*
Output:
Enter A Number:
55
55 Is Positive
*/
  47. C Program to input a employee data and print that 
    #include<stdio.h>
#include<string.h>
struct Employee
{
    char name[30];
    int roll_no;
    char favChar;
    char address[40];
};
int main()
{
    struct Employee s1;

    printf("\nEnter Employee Name:\n");
	scanf("%s", s1.name);
    printf("Enter Employee Salary.:\n");
    scanf("%d", &s1.roll_no);

    printf("Enter Employee Address:\n");
    scanf("%s", &s1.address);


    printf("\n\n\n\tThe Employee Name Is:%s", s1.name);
    printf("\n\tThe Employee Roll No. Is:%d", s1.roll_no);
    printf("\n\tThe Employee Address Is:%s", s1.address);

    return 0;
}
/*
Output:
Enter Employee Name:
John
Enter Employee Salary.:
15000
Enter Employee Address:
Canada



        The Employee Name Is:John
        The Employee Roll No. Is:15000
        The Employee Address Is:Canada
*/
  48. C Program to Input Student Detais and Print That 
    #include <stdio.h>
struct student
{
    char name[30];
    int roll_no;
    char favChar;
    char address[40];
};
int main()
{
    struct student s1;

    printf("\nEnter Student Name:\n");
	scanf("%s", s1.name);
    printf("Enter Student Roll No.:\n");
    scanf("%d", &s1.roll_no);

    printf("Enter Student Favourate Chracter:\n");
    scanf(" %c", &s1.favChar);

    printf("Enter Student Address:\n");
    scanf("%s", &s1.address);

    printf("\nStudent Details");
    printf("\n\nThe Student Name Is:%s", s1.name);
    printf("\nThe Student Roll No. Is:%d", s1.roll_no);
    printf("\nThe Student Favourate Chracter Is:%c", s1.favChar);
    printf("\nThe Student Address Is:%s", s1.address);

    return 0;
}
/*
Output:
Enter Student Name:
John
Enter Student Roll No.:
12 
Enter Student Favourate Chracter:
W
Enter Student Address:
France

Student Details
The Student Name Is:John
The Student Roll No. Is:12
The Student Favourate Chracter Is:W
The Student Address Is:France
*/
  49. C Program to Convert Celcius to Fahrenheit 
    #include <stdio.h>
int main()
{
    float celsius, fahrenheit;
    printf("Enter temperature in Celsius: ");
    scanf("%f", &celsius);
    
    fahrenheit = (celsius * 9 / 5) + 32;
    printf("%.2f Celsius = %.2f Fahrenheit", celsius, fahrenheit);
    return 0;
}
/*
Output:
Enter temperature in Celsius: 0
0.00 Celsius = 32.00 Fahrenheit
*/
  50. C Program to reverse a number 
    #include <stdio.h>
int main() {
    int n, rev = 0, remainder;
    printf("Enter an integer: ");
    scanf("%d", &n);
    while (n != 0) {
        remainder = n % 10;
        rev = rev * 10 + remainder;
        n /= 10;
    }
    printf("Reversed number = %d", rev);
    return 0;
}
/*
Output:
Enter an integer: 5542
Reversed number = 2455
*/
  51. C Program to find a factorial of number using recursion 
    #include<stdio.h>
long int multiplyNumbers(int n);
int main() {
    int n;
    printf("Enter a positive integer: ");
    scanf("%d",&n);
    printf("Factorial of %d = %ld", n, multiplyNumbers(n));
    return 0;
}

long int multiplyNumbers(int n) {
    if (n>=1)
        return n*multiplyNumbers(n-1);
    else
        return 1;
}
/*
Output:
Enter a positive integer: 5
Factorial of 5 = 120
*/

    52. Star Patter's Programs

  52. C Program to print star pyramid Pattern 
    #include <stdio.h>
int main()
{
    int n, s, i, j;
    printf("Enter number of rows: ");
    scanf("%d", &n);
    for (i = 1; i <= n; i++)
    {
        for (s = i; s < n; s++)
        {
            printf(" ");
        }
        for (j = 1; j <= (2 * i - 1); j++)
        {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}
/*
Output:
Enter number of rows: 5
    *
   ***
  *****
 *******
*********
*/
  53. C Program to print half star Pattern Pyramid 
    #include <stdio.h>
int main()
{
    int i, j, n;
    printf("Enter number of rows: ");
    scanf("%d", &n);
    for (i = 1; i <= n; i++)
    {
        for (j = 1; j <= i; j++)
        {
            printf("* ");
        }
        printf("\n");
    }
    return 0;
}
/*
OUtput:
Enter number of rows: 5
* 
* *
* * *
* * * *
* * * * *

*/
  54. C Program to print inverted half star pyramid pattern 
    #include <stdio.h>
int main()
{
    int i, j, n;
    printf("Enter number of rows: ");
    scanf("%d", &n);
    for (i = n; i >= 1; i--)
    {
        for (j = 1; j <= i; j++)
        {
            printf("* ");
        }
        printf("\n");
    }
    return 0;
}
/*
Output:
Enter number of rows: 5
* * * * * 
* * * *
* * *
* *
*

*/
  55. C Program to print Hollow star pyramid pattern 
    #include <stdio.h>
int main()
{
    int r, i, j, s;
    printf("Enter number of rows: ");
    scanf("%d", &r);
    for (i = 1; i <= r; i++)
    {
        for (s = i; s < r; s++)
            printf(" ");
        for (j = 1; j <= (2 * r - 1); j++)
        {
            if (i == r || j == 1 || j == 2 * i - 1)
                printf("*");
            else
                printf(" ");
        }
        printf("\n");
    }
    return 0;
}
/*
Output:
Enter number of rows: 5
    *        
   * *
  *   *
 *     *
*********
*/
  56. C Program to print reverse hollow star pyramid pattern 
    #include <stdio.h>
int main()
{
    int r, i, j, s;
    printf("Enter number of rows: ");
    scanf("%d", &r);
    for (i = r; i >= 1; i--)
    {
        for (s = i; s < r; s++)
            printf(" ");
        for (j = 1; j <= 2 * i - 1; j++)
        {
            if (i == r || j == 1 || j == 2 * i - 1)
                printf("*");
            else
                printf(" ");
        }
        printf("\n");
    }
    return 0;
}
/*
Output:
Enter number of rows: 5
*********
 *     *
  *   *
   * *
    *
*/
  57. C Program To Print Square Star Pattern 
    #include <stdio.h>
int main()
{
    int n, i, j;
    printf("Enter the number of rows:\n");
    scanf("%d", &n);
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            printf("*");
        }
        printf("\n");
    }

    return 0;
}
/*
Output:
Enter the number of rows:
5
*****
*****
*****
*****
*****
*/
  58. C Program To Print Plus Pattern 
    #include <stdio.h>

int main()
{
    int n, i, j;
    printf("Enter The Number To Print Plus Pattern(Odd Only):\n");
    scanf("%d", &n);
    for (i = 1; i <= n; i++)
    {
        if (i == ((n / 2) + 1))
        {
            for (j = 1; j <= n; j++)
            {
                printf("+");
            }
        }
        else
        {
            for (j = 1; j <= n / 2; j++)
            {
                printf(" ");
            }
            printf("+");
        }
        printf("\n");
    }
    return 0;
}
/*
Output:
Enter The Number To Print Plus Pattern(Odd Only):
5
  +
  +
+++++
  +
  +
*/
  59. C Program To Print X Star Pattern 
    #include <stdio.h>

int main()
{
    int n, m, i, j;
    printf("Enter the number:\n");
    scanf("%d", &n);
    m = 2 * n - 1;
    for (i = 1; i <= m; i++)
    {
        for (j = 1; j <= m; j++)
        {
            if (i == j || j == (m - i + 1))
            {
                printf("*");
            }
            else
            {
                printf(" ");
            }
        }
        printf("\n");
    }
    return 0;
}
/*
Output:
Enter the number5
*       *
 *     *
  *   *
   * *
    *
   * *
  *   *
 *     * 
*       *
*/

    60. C Programming Project

  60. Calculator Using Case Statement 
    
#include <stdio.h>
int main()
{
    int a, b;
    char op;
    float result;

    printf("Enter First Number:");
    scanf("%d", &a);

    printf("Enter Second Number:");
    scanf("%d", &b);

    printf("Enter OPerater:");
    scanf(" %c", &op);

    switch (op)
    {
    case '+':
        result = a + b;
        printf("The Sum Is %f", result);
        break;

    case '-':
        result = a - b;
        printf("The Subtracr Is %f", result);
        break;

    case '*':
        result = a * b;
        printf("The Multiply Is %f", result);
        break;

    case '/':
        result = a / b;
        printf("The Division Is %f", result);
        break;

    default:
        printf("Please Envalid Operater");
        break;
    }
    return 0;
}
/*
Output:
Enter First Number:4
Enter Second Number:5
Enter OPerater:+
The Sum Is 9.000000
*/