國立暨南國際大學 102 學年度第二學期小考試卷

1. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   // String Objects (P.510)
   #include <iostream>
   #include <string>
   using std::cout;
   using std::endl;
   using std::string;
   
   int main()
   {
       int a = 5;
       string b(a);
       cout << b << endl;
       return 0;
   }
   
   
   
2. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   
   // Searching Strings (P.523)
   #include <iostream>
   #include <string>
   using std::cout;
   using std::endl;
   using std::string;
   
   int main()
   {
       string a("NCNU");
       string b("N");
       cout << a.find(b) << a.find(b, 2) << endl;
       return 0;
   }
   
   
   
3. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   
   // The Size of a Vector (P.655)
   #include <iostream>
   #include <string>
   #include <vector>
   using std::cout;
   using std::endl;
   using std::string;
   using std::vector;
   
   int main()
   {
       vector<string> a;
       int b = 5;
       int c = 27;
   
       cout << a.size() << endl;
       a.push_back(b);
       a.push_back(c);
       cout << a.size() << endl;
   
       return 0;
   }