string::compare - C++ Reference

转载于 2013-01-14 00:44:00 发布 · 105 阅读

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#c/c++

本文通过一个简单的C++程序示例介绍了如何使用string::compare方法来比较两个字符串。示例中展示了如何判断两个字符串是否相同，以及如何比较字符串的一部分。

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string::compare - C++ Reference

// comparing apples with apples
#include <iostream>
#include <string>
using namespace std;

int main ()
{
  string str1 ("green apple");
  string str2 ("red apple");

  if (str1.compare(str2) != 0)
    cout << str1 << " is not " << str2 << "\n";

  if (str1.compare(6,5,"apple") == 0)
    cout << "still, " << str1 << " is an apple\n";

  if (str2.compare(str2.size()-5,5,"apple") == 0)
    cout << "and " << str2 << " is also an apple\n";

  if (str1.compare(6,5,str2,4,5) == 0)
    cout << "therefore, both are apples\n";

  return 0;
}