/*cb21a_c++_string对象的比较

 s.compare(s2)--区分大小的

 s.compare(pos1,n1,s2)

 s.compare(pos1,n1,s2,pos2,n2)

 s.compare(cp)

 s.compare(pos1,n1,cp)

 s.compare(pos1,n1,cp,n2)

 >，<,==，！=，都是区分大小的

 欢迎讨论，相互学习。 txwtech@163.com

 */

 #include <iostream>

 #include <string>

 using namespace std;

 int main()

 {

     string s1("abcxyz");

     string s2("abdxyz");

     const char *cp = "aabxxz";

     if (s1 != s2)

         cout << "不相等" << endl;

     if (s1 == s2)

         cout << "相等" << endl;

     if (s1 > s2)

         cout << "s1大于s2" << endl;

     if (s1 < s2)

         cout << "s1小于s2" << endl;

     if (s1.compare(s2) > )

         cout << "s1大于s2" << endl;

     if (s1.compare(s2) < )

         cout << "s1小于s2" << endl;

     if (s1.compare(s2) == )

         cout << "s1等于s2" << endl;

     if (s1.compare(, , s2) > )

         cout << "s1的第三位开始的连续3个字母比s2大" << endl;

     if (s1.compare(, , s2, , ) == )

         cout << "s1的第3位开始的3个字符与s2的第3位开始的3个字符相等,实现部分比较" << endl;

     if (s1.compare(, , cp, , ) > )

         cout << "s1的第3位开始的3个字符与指针的第3位开始的3个字符比较，s1大。" << endl;

     if (s1.compare(, , cp) > )

         cout << "s1的第3位开始的3个字符与指针整体比较，s1大" << endl;

     return ;

 }