何權晉

1. #include<iostream>
   
2. #include<cmath>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string st="dsanfj";
   
7.     cout<<st.replace(2,1,"j")<<endl;
   
8.    
   
9.    
   
10. system("pause");
    
11. return 0;
    
12. }

複製代碼