Source of exception_classes1.cpp

Structures and functions

  1: //exception_classes1.cpp

  3: #include <iostream>
  4: #include <fstream>
  5: #include <string>
  6: #include <vector>
  7: #include <stdexcept>
  8: using namespace std;

 10: #include "utilities.h"
 11: using Scobey::Pause;

 13: int main(int argc, char* argv[])
 14: {
 15:         ifstream inFile;
 16:         try
 17:         {
 18:                 //Test the command-line arguments
 19:                 if (argc != 4)
 20:                         throw invalid_argument("Error: Program requires 3 arguments.");

 22:                 //Test whether an input file can be opened
 23:                 inFile.open(argv[2]);
 24:                 if (!inFile.is_open())
 25:                         throw runtime_error("Error: " + string(argv[2]) + " could not be opened.");
 26:                 //If file opened OK, process its contents ...
 27:         }
 28:         catch (invalid_argument e)
 29:         {
 30:                 cout << e.what() << endl;
 31:                 Pause(0, "Program is now terminating.");
 32:                 return 0;
 33:         }
 34:         catch (runtime_error e)
 35:         {
 36:                 //If something went wrong, close any opened files before terminating
 37:                 inFile.close();
 38:                 cout << e.what() << endl;
 39:                 Pause(0, "Program is now terminating.");
 40:                 return 0;
 41:         }
 42: }