C program to print the greatest of three numbers

The following program prints the greatest number among three numbers.

Program 1: C program to print the greatest of three numbers

#include<stdio.h>
int main()
{
    int a,b,c,large;
    printf("Enter three numbers: ");
    scanf("%d %d %d",&a,&b,&c);    
    if(a>b)
    {
        if(a>c)
            large=a;
        else
            large=c;
    }
    else    if(b>c)
            large=b;
        else
            large=c;
    printf("\nThe largest out of three numbers is: %d\n",large);
    return 0;
}

Output: Prints largest among three numbers

Enter three numbers: 34 85 57

The largest out of three numbers is: 85

Program 2: C program to print the largest among three numbers using function

As I’ve already mentioned in other programs, it is very easy to write functions to solve a problem if you know the algorithm. Therefore, by using above algorithm, we’ll write a C program to print the greatest of three numbers using function.

#include<stdio.h>
int large(int, int, int);   //function prototype
int main()
{
    int a,b,c;
    printf("Enter three numbers: ");
    scanf("%d %d %d",&a,&b,&c);   
    //printing and function calling simultaneously 
    printf("\nThe biggest of three numbers is: %d\n",large(a, b, c));
    return 0;
}
//function definition
int large(int a, int b, int c)
{
    // if b is smaller than a
    if(a>b)
    {
        if(a>c)
            return a;
        else
            return c;
    }
    else    
        //if b is greater than a
        if(b>c)         
            return b;
        else
            return c;
} 

Sample output #1:

Enter three numbers: 342 643 23

The biggest of three numbers is: 643

Sample output #2:

Enter three numbers: 93 27 132

The biggest of three numbers is: 132

That’s it. This is how we find and print the greatest among three numbers in C.

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