C program:find greatest of three numbers using function

C program: find greatest of three numbers using the function

In this tutorial, we will discuss a concept of  C program: find greatest of three numbers using the function

In this post, we will learn how to find the greatest number  of three numbers using a user-defined function in the C programming language

In my previous post, I have explained the various approaches to find the largest number of among  three numbers in C language

However, in this program, we embed the logic of the “find the greatest of three number” program in the function.

Here, I have explained how to find the greatest number from the given three numbers and how to embed this logic in the function.

Program 1

Find the greatest of three numbers using Nested if statements

This program allows the user to enter three numbers and compare to select the largest number using nested if  statements

#include <stdio.h>
#include <stdlib.h>
biggestNumber(int,int,int);//function prototype
int main()
{

    int a,b,c;
    printf("Enter the three numbers\n");
    scanf("%d%d%d",&a,&b,&c);
//read the numbers from user
    int result=biggestNumber(a,b,c);//function call
    printf("Biggest number is: %d\n",result);
//display the output on the screen
    getch();
    return 0;
}
int biggestNumber(int a,int b,int c){//function definition with parameter
if(a>b)
{
    if(a>c)
    return a;
    else
        return c;
}
else
{
    if(b>c)
        return b;
    else
        return c;
}
}

When the above code is executed, it produces the following results

Enter the three numbers
45
89
67
Biggest number is: 89

 

Find the greatest of three numbers using if-else-if statements

This program allows the user to enter three numbers and compare to select the largest number using if-else-if statements

Program 2

#include <stdio.h>
#include <stdlib.h>
biggestNumber(int,int,int);//function prototype

int biggestNumber(int a,int b,int c){//function definition with parameter
    int biggest;
if(a>b && a>c)
    biggest=a;
else if(b>a && b>c)
    biggest=b;
else
    biggest=c;
return biggest;
}
int main()
{
    int a,b,c;
    printf("Enter the three numbers\n");
//reads the number for find largest
    scanf("%d%d%d",&a,&b,&c);
    int result=biggestNumber(a,b,c);//call the function
    printf("Biggest number is: %d\n",result);
//display output on the screen
    getch();
    return 0;
}

When the above code is executed, it produces the following results

Enter the three numbers
34
56
43
Biggest number is: 56

 

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