C++ program to Find Smallest of three numbers

C++ program to Find Smallest of three numbers

In this article, we will discuss the concept of C++ program to Find Smallest of three numbers

In this post, we are going to learn how to write a program to find smallest number out of three numbers using different methods in C++ program.

Code to find smallest numbers

Code to find smallest numbers  using if statements

In this code, we will find smallest number out of three numbers using if statements in C++ language

Program 1

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

int main()
{
    int num1,num2,num3; //declare the variables
    cout<<"Enter three numbers: ";
    //Ask input from the user
    cin>>num1>>num2>>num3;
    //Reading the input from user for numbers
       if(num1<=num2 && num1<=num3){
            //compare num1 with num2 and num3
    cout<<"\n The smallest number is: "<<num1;
}
if(num2<=num1 && num2<=num3){
        //compare num2 with num1 and num3
      cout<<"\n The smallest number is:"<<num2;
}
if(num3<=num1 && num3<=num2){
    //compare num3 with num1 and num2
      cout<<"\n The smallest number is: "<<num3;
}
    getch();
    return 0;
}

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

Enter three numbers 56
78
23
The smallest number is: 23

 

Code to find smallest numbers  using if else-if statements

In this code, we will find smallest number out of three numbers using if else-if statements in C++ language

Program 2

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

int main()
{
    int num1,num2,num3; //declare the variables
    cout<<"Enter three numbers: ";
    //Ask input from the user
    cin>>num1>>num2>>num3;
    //Reading the input from user for numbers
       if(num1<=num2 && num1<=num3){
            //compare num1 with num2 and num3
    cout<<"\n The smallest number is: "<<num1;
}
else if(num2<=num1 && num2<=num3){
        //compare num2 with num1 and num3
      cout<<"\n The smallest number is:"<<num2;
}
else{
    //compare num3 with num1 and num2
      cout<<"\n The smallest number is: "<<num3;
}
    getch();
    return 0;
}

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

Enter three numbers 27
67
89

The smallest number is: 27

 

Code to find smallest numbers  using Nested if statements

In this code, we will find smallest number out of three numbers using nested if statements in C++ language

Program 3

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

int main()
{int num1,num2,num3; //declare the variables
    cout<<"Enter three numbers: ";
    //Ask input from the user
    cin>>num1>>num2>>num3;
    //Reading the input from user for numbers

       if(num1<num2){//compare num1 and num2
            if(num1<num3){//compare num1 and num3
          cout<<"\n The smallest number is: "<<num1;
            }
            else{
                 cout<<"\n The smallest number is: "<<num3;
            }
    }
    else{
        if(num2<num3){//compare num2 and num3
             cout<<"\n The smallest number is: "<<num2;
        }
        else{
             cout<<"\n The smallest number is: "<<num3;
        }

    }
    getch();
    return 0;
}

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

Enter three numbers 34
67
98

The smallest number is: 34

 

Code to find smallest numbers  using ternary operator

In this code, we will find smallest number out of three numbers using ternary operator in C++ language

Program 4

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    int num1,num2,num3; //declare the variables
    cout<<"Enter three numbers: ";
    //Ask input from the user
    cin>>num1>>num2>>num3;
    //Reading the input from user for numbers
       int result=num3<(num1<num2?num1:num2)?num3:((num1<num2)? num1:num2);
        cout<<"\n The Smallest number is: %d "<<result;
        getch();
    return 0;
}

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

Enter three numbers 45
32
56

The smallest number is: 32

 

 

Program 5

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    int num1,num2,num3; //declare the variables
    cout<<"Enter three numbers: ";
    //Ask input from the user
    cin>>num1>>num2>>num3;
    //Reading the input from user for numbers
       int temp=((num1<num2)? num1:num2);
int result=num3<temp?num3:temp;
        cout<<"\n The Smallest number is: %d "<<result;
        getch();
    return 0;
}

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

Enter three numbers 46
76
21

The smallest number is: 21

 

Code to find smallest numbers  using function

In this code, we will find smallest number out of three numbers using function in C++ language

Program 6

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

int smallestNum(int, int,int);//function prototype
int main()
{
    int num1,num2,num3;
     //declare the variables
    cout<<"Enter three number: ";
    //ask input from the user
    cin>>num1>>num2>>num3;
    //reading input from user for 3 numbers
    smallestNum(num1,num2,num3);
    //calling the function
    getch();
    return 0;
}

    int smallestNum(int num1,int num2,int num3){//function definition
    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 result

Enter three numbers 12
78
45

The smallest number is: 12

 

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