楊芊琦

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. using namespace std;
   
5. 
   
6. int main()
   
7. {
   
8.     string word = "abcdefg";
   
9.     cout << word.substr() << endl;
   
10.     cout << word.substr(0,3) << endl;
    
11.     cout << word.substr(3,3) << endl;
    
12.     cout << word.substr(1) << endl;
    
13.     system("pause");
    
14.     return 0;
    
15. }

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