李宗儒

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. using namespace std;
   
5. 
   
6. int main()
   
7. {
   
8.     string a1="0123456789";
   
9.     cout<<"原字串:"<<a1<<endl;
   
10.     cout<<a1.substr(7)<<endl;
    
11.     cout<<a1.substr(2)<<endl;
    
12.     cout<<a1.substr(4,4)<<endl;
    
13.     cout<<a1.substr(1,8)<<endl;
    
14. }

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