Cpp program:find smallest of three numbers using function

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

In this post, we will learn how to find the smallest number among 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 smallest number of among three numbers in C++ language

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

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

Program 1

Find the smallest of three numbers using Nested if statements

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

Program 1

#include <iostream>
#include <conio.h>
using namespace std;

int biggestNum(int, int,int);
int main()
{
    int num1,num2,num3; //declare the variables
    cout<<"Enter the first number:  ";
    cin>>num1;//get input from user for num1
    cout<<"Enter the second number: ";
    cin>>num2;//get input from user for num2
    cout<<"Enter the third number: ";
    cin>>num3;//get input from user for num3
    biggestNum(num1,num2,num3);
    getch();
    return 0;
}

    int biggestNum(int num1,int num2,int num3){
    if(num1<num2){//compare num1 and num2
            if(num1<num3){//compare num1 and num3
         cout<<"\nSmallest number is:" <<num1;
            }
            else{
                cout<<"\nSmallest number is:"<<num3;
            }
    }
    else{
        if(num2<num3){//compare num2 and num1
            cout<<"\nSmallest number is:"<<num2;
        }
        else{
            cout<<"\nSmallest number is:"<<num3;
        }

    }
    }

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

Enter the first number: 56
Enter the second number: 23
Enter the third number: 69

The smallest number is: 23

Program 2

Find the smallest of three numbers using if else if statements

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

Program 2

#include <iostream>
#include <conio.h>
using namespace std;

int biggestNum(int, int,int);
int main()
{
    int num1,num2,num3; //declare the variables
    cout<<"Enter the first number:  ";
    cin>>num1;//get input from user for num1
    cout<<"Enter the second number: ";
    cin>>num2;//get input from user for num2
    cout<<"Enter the third number: ";
    cin>>num3;//get input from user for num3
    biggestNum(num1,num2,num3);
    getch();
    return 0;
}

    int biggestNum(int num1,int num2,int num3){
    if(num1<num2&&num1<num3){
         cout<<"\nSmallest number is:" <<num1;
            }
    else if(num2<num3){//compare num2 and num1
            cout<<"\nSmallest number is:"<<num2;
        }
        else{
            cout<<"\nSmallest number is:"<<num3;
        }

    }

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

Enter the first number: 23
Enter the second number: 78
Enter the third number: 54

Smallest number is:23

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Cpp program:find smallest of three numbers using function

Cpp program:find smallest of three numbers using function