C++ Program to Add Three Numbers

In this post, we will learn how to add three numbers using C++ Programming language.

This program asks the user to enter three integers, then it computes the sum of these three numbers using simple arithmetic operators.

So, without further ado, letâ€™s begin this tutorial.

C++ Program to Add Three Numbers

```// C++ Program to Add Three Numbers
#include <iostream>
using namespace std;

int main(){
int a, b, c, sum;

cout << "Enter first number: ";
cin >> a;
cout << "Enter second number: ";
cin >> b;
cout << "Enter third number: ";
cin >> c;

// Calculating sum
sum = a + b + c;

// Displaying output
cout << "Sum of three numbers: " << sum << endl;
return 0;
}
```

Output

``````Enter first number: 10
Enter second number: 15
Enter third number: 20
Sum of three numbers: 45
``````

How Does This Program Work ?

```    int a, b, c, sum;
```

In this program, we have declared four int data type variables named as a, b, c and sum.

```    // Asking for input
cout << "Enter first number: ";
cin >> a;
cout << "Enter second number: ";
cin >> b;
cout << "Enter third number: ";
cin >> c;
```

Then, the user is asked to enter the three numbers.

```    // Calculating sum
sum = a + b + c;
```

We calculate the sum of these three numbers using the plus (+) operator.

```    // Displaying output
cout << "Sum of three numbers: " << sum << endl;
```

Finally, the sum of three numbers is displayed on the screen using the cout statement.

Conclusion

I hope after going through this post, you understand how to add three numbers using C++ Programming language.

If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to solve your query.