#include<iostream>
#include<string>
using namespace std;
int main(void) {
  string input;
  int num,total=0;
  bool more=true;
  while(more) {
    cout<<"Enter a number or Q to end:";
    cin>>input;
    try { //try to convert string to int
      num=stoi(input); //converts string "12" or "12x" to the integer 12, but "$12" throws error
      total+=num; //add the value to total if conversion worked
    }
    catch(invalid_argument&) { //catch error if string cannot be converted to int
      if(input!="Q" && input!="q") cout<<"Cannot convert "<<input<<" to integer\n";
      else more=false;
    } //catch error
  }//while
  cout<<"Total="<<total<<endl;
  system("pause");
  return 0;
} //main