#include<iostream>

//use cout and cin to print some stuff and get input

int main(){
	/*
	 * All of these "<<" are going into std::cout
	 * the "endl" forces a flush
	 * note that is "l" as in "line" not "1" as in "one"
	 */
	std::cout << "Enter numbers, press <ctrl-d> to finish: "<< std::endl;

	int input;
	int sum;
	input = 0;
	sum = 0;
	
	/*
	 * For some reason this is deliminated by spaces
	 * if only one number is given, it will wait for another input
	 */
	while (std::cin >> input){
		sum += input;
	}
	

	/*
	 * formated for legability
	 * we are putting all those things into std::cout in the order they appear
	 */
	std::cout << "The sum is " 
						<< sum 
						<< std::endl;
}