Answer to Question #24390 in C++ for Nour

Question

Write a function called Sum that calculates and returns the sum of all numbers from 1 through the int passed to the function.

Answer 1

# include <iostream>
using namespace std;

int sum(int a)
{
int res=0;
if (a<1) return 0;
for (int i=1;i<=a;i++)
res+=i;
return res;
}

int main(){

int a=5;
cout<<sum(a);

system("PAUSE");
return 0;
}