Program to Find Largest of Three Numbers - C, C++ Code

• Write a program to find largest of three numbers.
• C program to find largest of three numbers.
• C++ program to find largest of three numbers.

In this program, We'll take three input numbers and print largest among three numbers. To solve this problem, first let's write an algorithm to find largest number among three numbers.

Algorithm to Find Largest of Three Numbers

 1. Declare three variable a ,b, c.

 2. Compare a with b and c. If a is greater than b and c than a is greatest among three numbers.

 3. Compare b with a and c. if b is greater than a and c than b is greatest among three numbers.

 4. Compare c with a and b. If c is greater than a and b than c is greatest among three numbers.

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C Program to Find Largest of  Three Numbers

We have discussed the algorithm to find largest among three numbers. Let's write a c code to find largest among three input numbers.

#include <stdio.h>
 
int main() {
 
      int a, b, c;
 
      printf("Enter three numbers: ");
      scanf("%d %d %d", &a, &b, &c);
 
      //If a is greater than b and c

      if(a >= b && a >= c){
         printf("Largest number is %d", a);
 
      //if b is greater than a and c

      }else if(b >= a && b >= c){
         printf("Largest number is %d", b);
 
      //If c is greater than a and b

      }else if(c >= a && c >= b){
         printf("Largest number is %d", c);
 
      } 
      return 0;
}

Output -

Enter three numbers :

14
34
23

Largest number is : 34

C Program Find Largest of three Numbers using Ternary Operator

In this programming example, We are going to use conditional operator to print largest of three numbers.

#include <stdio.h>

int main(void) {
 
    int a, b, c, larg;
 
    printf("Enter three numbers \n");
    scanf("%d %d %d", &a , &b , &c);
 
 
    larg =  (a > b && a > c) ? a : b > c ? b : c ;
 
    printf("Largest number is %d ", larg);

 
    return 0;
}

C++ Program Find Largest of three Numbers

We have written a code, Let's write a C++ code to print larges among three numbers.

#include <iostream>
using namespace std;

int main() {
 
    int a, b, c;
 
    cout << "Enter three numbers \n";

    /* Taking input */
    cin >> a >> b >> c;
 
    /* If a is greater than b and c. */

    if (a > b && a > c) {
       cout << "Largest number is " << a;

    /* If b is greater than a and c */
    } else if (b > a && b > c) {
       cout << "Largest number is " << b;

    } else {
       cout << "Largest number is "<< c;

    }
 
     return 0;
}

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