string类的成员函数

compare 比较

// string constructor
#include <iostream>
#include <string>
using namespace std;

int main ()
{
  // constructors used in the same order as described above:
  string s1;
  string s5 ("Initial string");
  string s2 (s5);
  string s3 (s5, 8, 3);
  string s4 (s5, 8);
  string s6 (10, ‘x‘);
  string s7a (10, 42);
  string s7b (s5.c_str(), s5.c_str()+4);

  cout << "s1: " << s1 << "\ns2: " << s2 << "\ns3: " << s3;
  cout << "\ns4: " << s4 << "\ns5: " << s5 << "\ns6: " << s6;
  cout << "\ns7a: " << s7a << "\ns7b: " << s7b << endl;
  return 0;
}

Output:
s1: 
s2: Initial string
s3: str
s4: Initial
s5: Initial string
s6: xxxxxxxxxx
s7a: **********
s7b: Init

// string assigning
#include <iostream>
#include <string>
using namespace std;

int main ()
{
  string str1, str2, str3;
  str1 = "Test string: ";   // c-string
  str2 = ‘x‘;               // single character
  str3 = str1 + str2;       // string

  cout << str3  << endl;
  return 0;
} 

string类的成员函数

原文：http://blog.csdn.net/chang_mu/article/details/19501245