盧玄皓

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<cmath>
   
4. using namespace std;
   
5. int main()
   
6. {
   
7.     string a="121415";
   
8.     cout<<"數字:"<<a<<endl;
   
9.    
   
10.     cout<<a.substr(1,5)<<endl;
    
11.     cout<<a.substr(4,1)<<endl;
    
12.      cout<<a.substr(2)<<endl;
    
13. 
    
14.     system("pause");
    
15.     return 0;   
    
16. }

複製代碼