國立暨南國際大學 101 學年度第一學期小考試卷

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 Copy
   #include <iostream>
   #include <cstring>
   
   using std::cout;
   using std::endl;
   
   int main()
   {
           char str1[] = "APPLE";
           char str2[] = "abc";
           strncpy(str1, str2, 3);
           cout << str1 << 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).
   
   // Copying n characters
   #include <iostream>
   #include <cstring>
   
   using std::cout;
   using std::endl;
   
   int main()
   {
           char str1[] = "APPLE";
           char str2[] = "abc";
           strncpy(str1, str2, 4);
           cout << str1 << 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).
   
   // Finding a character in a string
   #include <iostream>
   #include <cstring>
   
   using std::cout;
   using std::endl;
   
   int find(char *s, char c)
   {
       int len = 0;
       while (*++s != '\0')
           if (*s == c)
               len++;
       return len;
   }
   
   int main()
   {
       char str1[] = "This is an island.";
       char str2[] = "That is a dog.";
      
       cout << find(str1, 'i') << endl;
       cout << find(str2, 'T') << endl;
       return 0;
   }