C++ examples for Function:Function Return
Compute the sum from user input number.
#include <iostream> using namespace std; int sum(int num); int main()//from w w w . jav a2 s. com { int num, sumd; cout << "Please type a number: "; cin >> num; sumd = sum(num); cout << "The sum of the digits is " << sumd; return 0; } int sum(int num) { int ctr; int sumd=0; if (num <= 0) { sumd = num; } else { for (ctr=1; ctr<=num; ctr++) { sumd += ctr; } } return(sumd); }