C++ program to add two numbers without using arithmetic operators

Karmehavannan

6 years ago

C++ program to add two numbers with out using arithmetic operators

In this tutorial, we will discuss the concept of C++ program to add two numbers without using arithmetic operators

In this post, we will learn how to make the addition of two number using without the arithmetic operator in C++ programming language

C++ program to add two numbers with out using arithmetic operators — Addition

Using for loop – program 1

This program allows the user to enter two numbers and displays the sum of two numbers entered by the user using for loop

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

int main()
{
    int num1,num2,i;  //variable declaration
    cout<<"Enter the first number: ";
   cin>>num1;
    cout<<"Enter the second number: ";
     cin>>num2;
    for(i=0; i<num2; i++){
   num1++;
    }
cout<<"Sum of two numbers is: "<<num1;
getch();
}

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

Enter the first numb er: 345
Enter the second number: 155
Sum of two numbers is: 500

Methods

The user inputs the first number
Store the number in variable num1
The user inputs the second number
Store the number in variable num2
“for loop” used for the addition of two numbers.
Display the sum of the numbers on the screen.

Using while loop – Program 2

This program allows the user to enter two numbers and displays the sum of two numbers entered by the user using while loop

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

int main()
{
    int num1,num2,i;  //variable declaration
    cout<<"Enter the first number: ";
   cin>>num1;
    cout<<"Enter the second number: ";
    cin>>num2;
    while(num2 != 0){
int num3=(num1 & num2);
num1=num1^num2;
num2=num3<<1;
}
cout<<"\nSum of two numbers is: "<<num1;
getch();
}

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

Enter the first numb er: 123
Enter the second number: 432
Sum of two numbers is: 555

Methods

The user inputs the first number
Store the number variable num1
The user inputs the second number
Store the number variable num2
“while loop” used for the addition of two numbers.
Display the sum of the numbers on the screen.

Using for loop inside the method

This program allows the user to enter two numbers and displays the sum of two numbers entered by the user using for loop inside the method

#include <iostream>
#include <conio.h>
using namespace std;
int add(int ,int);//Function prototype
int main()
{
    int n1,n2;
    cout << "Enter the first number" << endl;
    cin>>n1;
   cout << "Enter the second number" << endl;
    cin>>n2;
     cout<<"Sum of two  numbers is:"<<add(n1,n2);  //function call
     getch();
    return 0;
}

int add(int num1, int num2){  //function definition
int i;
for(i=0; i<num2; i++){
   num1++;
}
return num1;


}

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

Enter the first numb er: 
125
Enter the second number: 
235
Sum of two numbers is: 360

Method

The user inputs the first number
Store the number in variable n1
The user inputs the second number
Store the number in variable n2
Create a function with “for loop” to find the sum of two numbers.
Call the function inside the main method.
Display the sum of the number

using while loop inside the method

This program allows the user to enter two numbers and displays the sum of two numbers entered by the user using while loop inside the method

#include <iostream>
#include <conio.h>
using namespace std;
int add(int ,int);   //function prototype
int main()
{
    int n1,n2;
    cout << "Enter the first number" << endl;
    cin>>n1;
   cout << "Enter the secone number" << endl;
    cin>>n2;
     cout<<"Sum of two  numbers is:"<<add(n1,n2);  //function call
     getch();
    return 0;
}

int add(int num1, int num2){   //function definition
int i;
while(num2 != 0){
int num3=(num1 & num2);
num1=num1^num2;
num2=num3<<1;
}
return num1;


}

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

Enter the first numb er: 
234
Enter the second number: 
456
Sum of two numbers is: 690

Method

The user inputs the first number
Store the number in variable n1
The user inputs the second number
Store the number in variable n2
Create a function with “while loop” to find the sum of two numbers.
Call the function inside the main method.
Display the sum of the number

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C++ program to add two numbers without using arithmetic operators