String

 1 #include<cstdio>
 2 #include<string>
 3 #include<iostream>
 4 using namespace std;
 5 
 6 int main()
 7 {
 8     string str="i love you";
 9     cout<<str<<endl;
10     string::iterator ptr;       //智能指针
11     for(ptr=str.begin();ptr!=str.end();ptr++)
12         cout<<*ptr<<"";
13     cout<<endl;
14     string Cstr;
15     Cstr=str;
16     cout<<Cstr<<endl;
17     Cstr+=str;
18     cout<<Cstr<<endl;
19     bool ans=(Cstr==str);
20     cout<<ans<<endl;;
21     string CCstr;
22     CCstr=Cstr+str;
23     cout<<CCstr<<endl;
24     CCstr.erase(CCstr.begin(),CCstr.end());
25     cout<<CCstr.size()<<endl;
26     Cstr.erase(0,10);
27     cout<<Cstr<<endl;
28     Cstr.erase(Cstr.begin());
29     cout<<Cstr<<endl;
30     Cstr.insert(0,"123456");
31     cout<<Cstr<<endl;
32     Cstr.insert(0,"123456",2,3);
33     cout<<Cstr<<endl;
34     string Fstr="i love you";
35     string Sstr="u";
36     int index=Fstr.find_first_of(Sstr);  //查找Sstr字符串中的任意一个字符在Fstr中最开始出现的位置
37     cout<<index<<endl;
38     index=Fstr.find_last_of(Sstr);       //查找Sstr字符串中任意一个字符在Fstr中最末尾出现的位置
39     cout<<index<<endl;
40     return 0;
41 }