return the sum of two numbers c++ code example
Example 1: sum of 2 numbers in cpp
#include<iostream>
int add(int,int);
int main()
{
using namespace std;
int a,b;
cout<<"Enter first number: ";
cin>>a;
cout<<"Enter second number: ";
cin>>b;
cout<<"Sum = "<<add(a,b);
}
int add(int x,int y)
{
return(x+y);
}
Example 2: c++ sum of all numbers up to a number
int sum(int n){
return (n * (n+1)) / 2;
}
int sum(int n){
int tempSum = 0;
for (int i = n; i > 0; i--){
tempSum += i;
}
return tempSum;
}
int sum(int n){
return n > 0 ? n + sum(n-1) : 0;
}