Here is a C++ program to find sum of two numbers. To find sum of two numbers in C++, we will first take two numbers as input from user using cin and store them in two local variable. Now, we will add two input numbers using addition operator ('+') and store the sum in third variable. Finally, we will print the sum of two numbers on screen using cout.
C++ program to add two numbers using + operator
#include <iostream>
using namespace std;
int main() {
float num1, num2, sum;
// Taking input from user
cout << "Enter Two Numbers\n";
cin >> num1 >> num2;
// Adding two input numbers
sum = num1 + num2;
// Printing output
cout << "Sum of "<< num1 << " and " << num2 << " is " << sum;
return 0;
}
Output
Enter Two Numbers 4 3.5 Sum of 4 and 3.5 is 7.5
C++ program to find sum of two numbers using function
In this program, we will use a user defined function float getSum(float a, float b) which takes two floating point number as input and returns the sum of input parameters.
#include <iostream>
using namespace std;
// Function to add two numbers
float getSum(float a, float b){
return a + b;
}
int main() {
float num1, num2, sum;
// Taking input from user
cout << "Enter Two Numbers\n";
cin >> num1 >> num2;
// Adding two input numbers by calling getSum function
sum = getSum(num1, num2);
// Printing output
cout << "Sum of "<< num1 << " and " <<
num2 << " is " << sum;
return 0;
}
Output
Enter Two Numbers 3.2 4.5 Sum of 3.2 and 4.5 is 7.7
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