• On September 14, 2021
• By Karmehavannan
• 1 Comment
• Categories: Find elements
• Tags: C++ programs, Cpp language, operator

Cpp program:find greatest of three numbers using function

Cpp program: find greatest of three numbers using the function

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

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

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

However, in this program, we embed the logic of the program in the user defined-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 in C++.

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 <iostream>
#include <conio.h>

using namespace std;
int findBiggest(int,int,int);//function prototype
int main()
{
    double num1, num2,num3; //declare the variables
    cout<<"Enter the first number to compare: ";
    cin>>num1;//get input from user for num1
    cout<<"Enter the second number to compare: ";
    cin>>num2;//get input from user for num2
    cout<<"Enter the third number to compare: ";
    cin>>num3;//get input from user for num3
    int result=findBiggest(num1,num2,num3);//function call
    cout<<"Biggest number is: "<<result;//display the output
   getch();
    return 0;
}
int findBiggest(int num1, int num2, int num3){//function definition
    int biggest;
    if(num1>=num2){
            if(num1>=num3){
                return num1;
            }
            else{
                return num3;
            }
    }
    else{
        if(num2>num3){
            return num2;
        }
            else{
                return num3;
            }
        }
}

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

Enter the first number to compare: 87
Enter the second number to compare: 23
Enter the third number to compare: 67
Biggest number is: 87

Program 2

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

#include <iostream>
#include <conio.h>

using namespace std;
int findBiggest(int,int,int);
int main()
{
    double num1, num2,num3; //declare the variables
    cout<<"Enter the first number to compare: ";
    cin>>num1;//get input from user for num1
    cout<<"Enter the second number to compare: ";
    cin>>num2;//get input from user for num2
    cout<<"Enter the third number to compare: ";
    cin>>num3;//get input from user for num3
    int result=findBiggest(num1,num2,num3);//function call
    cout<<"Biggest number is: "<<result;//Display the output
   getch();
    return 0;
}
int findBiggest(int num1, int num2, int num3){//function definition
    int biggest;
    if(num1>=num2 && num1>=num3){
         biggest=num1;
    }//num1 compare num 2 and num 3
    else if(num2>=num1 && num2>=num3){
        biggest=num2;
    }//num2 compare num1 and num3
    else{biggest=num3;
    }
    return biggest;

    }

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

Enter the first number to compare: 35
Enter the second number to compare: 89
Enter the third number to compare: 54
Biggest number is: 89

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