errtest.cpp

Thinking In C++ 第二版 随书配套代码

//: C09:ErrTest.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
//{T} ErrTest.cpp
// Testing require.h
#include "../require.h"
#include <fstream>
using namespace std;

int main(int argc, char* argv[]) {
  int i = 1;
  require(i, "value must be nonzero");
  requireArgs(argc, 1);
  requireMinArgs(argc, 1);
  ifstream in(argv[1]);
  assure(in, argv[1]); // Use the file name
  ifstream nofile("nofile.xxx");
  // Fails:
//!  assure(nofile); // The default argument
  ofstream out("tmp.txt");
  assure(out);
} ///:~