compare.cpp

Think in C++ 第二版源码

//: C17:Compare.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Demonstrates compare(), swap()
#include <string>
#include <iostream>
using namespace std;

int main() {
  string first("This");
  string second("That");
  // Which is lexically greater?
  switch(first.compare(second)) {
    case 0: // The same
      cout << first << " and " << second <<
        " are lexically equal" << endl;
      break;
    case -1: // Less than
      first.swap(second);
      // Fall through this case...
    case 1: // Greater than
      cout << first <<
        " is lexically greater than " <<
        second << endl;
  }
} ///:~