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C Exercises: Find the largest of three numbers

C Conditional Statement: Exercise-8 with Solution

Write a C program to find the largest of three numbers.

Pictorial Presentation:

Find the largest of three numbers

Sample Solution:

C Code:

#include <stdio.h>
void main()
{
    int num1, num2, num3;
 
    printf("Input the values of three numbers : ");
    scanf("%d %d %d", &num1, &num2, &num3);
    printf("1st Number = %d,\t2nd Number = %d,\t3rd Number = %d\n", num1, num2, num3);
    if (num1 > num2)
    {
        if (num1 > num3)
        {
            printf("The 1st Number is the greatest among three. \n");
        }
        else
        {
            printf("The 3rd Number is the greatest among three. \n");
        }
    }
    else if (num2 > num3)
        printf("The 2nd Number is the greatest among three \n");
    else
        printf("The 3rd Number is the greatest among three \n");
}

OR

#include <stdio.h>
void main() {
    int num1, num2, num3;
 
    printf("Input the values of three numbers : ");
    scanf("%d %d %d", &num1, &num2, &num3);
    printf("1st Number = %d,\t2nd Number = %d,\t3rd Number = %d\n", num1, num2, num3);
 
   if ((num1 > num2) && (num1 > num3))
            printf("The 1st Number is the greatest among three. \n");
 
   if ((num2 > num3) && (num2 > num1))
        printf("The 2nd Number is the greatest among three \n");
 
   if ((num3 > num1) && (num3 > num2))
           printf("The 3rd Number is the greatest among three. \n");
 
}

OR

#include <stdio.h>
void main() {
    int num1, num2, num3,ctr;
 
    printf("Input the values of three numbers : ");
    scanf("%d %d %d", &num1, &num2, &num3);
    printf("1st Number = %d,\t2nd Number = %d,\t3rd Number = %d\n", num1, num2, num3);
 
   if (num1 > num2 && num1 > num3) ctr=num1;
 
   if (num2 > num3 && num2 > num1) ctr=num2;

   if (num3 > num1 && num3 > num2) ctr=num3;
           printf("The %d is the greatest among three. \n",ctr);
 
}

Sample Output: 

Input the values of three numbers : 12 25 52                                                                                  
1st Number = 12,        2nd Number = 25,        3rd Number = 52                                                               
The 3rd Number is the greatest among three

Flowchart:

Flowchart: Find the largest of three numbers.

C Programming Code Editor:

Improve this sample solution and post your code through Disqus.

Previous: Write a C program to accept the height of a person in centimeter and categorize the person according to their height.
Next: Write a C program to accept a coordinate point in a XY coordinate system and determine in which quadrant the coordinate point lies.

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP