integertest.cpp

Thinking in c++ 2nd edition,c++编程思想（第2版）

//: C12:IntegerTest.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
//{L} Integer
#include "Integer.h"
#include <fstream>
using namespace std;
ofstream out("IntegerTest.out");

void h(Integer& c1, Integer& c2) {
  // A complex expression:
  c1 += c1 * c2 + c2 % c1;
  #define TRY(OP) \
    out << "c1 = "; c1.print(out); \
    out << ", c2 = "; c2.print(out); \
    out << ";  c1 " #OP " c2 produces "; \
    (c1 OP c2).print(out); \
    out << endl;
  TRY(+) TRY(-) TRY(*) TRY(/)
  TRY(%) TRY(^) TRY(&) TRY(|)
  TRY(<<) TRY(>>) TRY(+=) TRY(-=)
  TRY(*=) TRY(/=) TRY(%=) TRY(^=)
  TRY(&=) TRY(|=) TRY(>>=) TRY(<<=)
  // Conditionals:
  #define TRYC(OP) \
    out << "c1 = "; c1.print(out); \
    out << ", c2 = "; c2.print(out); \
    out << ";  c1 " #OP " c2 produces "; \
    out << (c1 OP c2); \
    out << endl;
  TRYC(<) TRYC(>) TRYC(==) TRYC(!=) TRYC(<=)
  TRYC(>=) TRYC(&&) TRYC(||)
} 

int main() {
  cout << "friend functions" << endl;
  Integer c1(47), c2(9);
  h(c1, c2);
} ///:~