C++ Calculator With Unlimited Inputs -

hi beginner c++ language , know if there way of writing program unlimited inputs. example: want write calculator program add numbers. that's easy enough there way user can add many numbers wants without being asked how many numbers wants. such if wants add 3 numbers can type "1+1+1" or if wants add 4 numbers adds "+1" end of previous line.like user not stuck fixed number of inputs or doesn't need asked how many inputs wants. functions in c++ need know in order

you can use while loop read standard input. (std::cin) basic code read while loop, , add input sum follows:

#include <iostream> #include <string> #include <cstdlib>  int main(){     std::string line = "";     double sum = 0.0;     while(line != "end"){         std::cout<<"the current sum is: "<<sum<<std::endl;         std::cout<<"enter number add or \"end\" exit: ";         std::cin>>line;         sum += atof(line.c_str());     }     std::cout<<"the final sum is: "<<sum<<std::endl; } 

this read numbers until receives input "end".