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).
   
   // Convert a string to a number
   #include <iostream>
   
   int eval(char* s)
   {
       const int base = 8;
       int sum = 0;
       while(*s)
           sum = sum * base + (*s++ - '0');
       return sum;
   }
   
   int main()
   {
       std::cout << eval("17") << std::endl;
       std::cout << eval("1221") << std::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).
   
   // Function Overloading (P.310)
   #include <iostream>
   
   int pdo_it(int a, int b, int c)
   { return a + b + c; }
   
   int pdo_it(int a, int b)
   { return a * b; }
   
   int main()
   {
       std::cout << pdo_it(12, 18) << std::endl;
       std::cout << pdo_it(2012, 12, 18) << std::endl;
       std::cout << pdo_it( pdo_it(20,12), 12, 18 ) << std::endl;
       return 0;
   }