1// enterInt.h
   2// Written by a group of students from section 1 of the Winter 2000-2001
   3//   offering of CS-182.
   4// Date: 2-6-2001
   5// This function will display "prompt" which should ask for an integer
   6//   and then allow the user to make an entry.
   7//   If the beginning of the entry is a valid integer value, the
   8//   function returns the value.  If not, the function will repeat
   9//   displaying the prompt and accepting the user's entry until
  10//   a valid integer value is entered.
  11int getInt(const string& prompt);

   1// main.cpp
   2// Written by: Dr. Taylor, taylor@msoe.edu
   3// Date: 2-15-2001
   4// This program demonstrates the use of the enterInt function which
   5//   will error check the user's entry to ensure that a valid
   6//   integer value is entered.
   7
   8#include <iostream>
   9#include <string>
  10#include "enterInt.h"
  11
  12using std::cout;
  13using std::string;
  14
  15int main()
  16{
  17   string prompt="Please enter your age";
  18   cout << "It looks like you are " << enterInt(prompt) << "years old\n";
  19
  20   return 0;
  21}

   1/* enterInt.cpp
   2/* Written by a group of students from section 1 of the Winter 2000-2001
   3/*    offering of CS-182.
   4/* Date: 2-6-2001
   5/* This function will display "prompt" which should ask for an integer
   6/*    and then allow the user to make an entry.
   7/*    If the beginning of the entry is a valid integer value, the
   8/*    function returns the value.  If not, the function will repeat
   9/*    displaying the prompt and accepting the user's entry until
  10/*    a valid integer value is entered.
  11*/
  12#include <iostream>
  13#include <string>
  14
  15using std::cout;
  16using std::endl;
  17using std::getline;
  18using std::string;
  19
  20int enterInt(const string& prompt)
  21{
  22   string input;
  23   int retVal;
  24   bool done = false;
  25   do {
  26      cout << prompt << endl;
  27      getline(cin, input);
  28      istringstream istr(input);
  29      if(!(istr >> retVal)) {
  30         done = true;
  31      }
  32   } while(!done);
  33   return retVal;
  34}