Sams Teach Yourself C++ in 21 Days

Answers 823

D Answers

Exercises ........................................................................................................

1. The following is one possible answer:
   1: #include
   2: using namespace std;
   3: int main()
   4: {
   5: cout << “I love C++\n”;
   6: return 0;
   7: }


2. The following program contains a main()function that does nothing. This is, how-
   ever, a complete program that can be compiled, linked, and run. When run, it
   appears that nothing happens because the program does nothing!
   int main(){}


3. Line 4 is missing an opening quote for the string.


4. The following is the corrected program:
   1: #include
   2: main()
   3: {
   4: std::cout << “Is there a bug here?”;
   5: }
   This listing prints the following to the screen:
   Is there a bug here?


5. The following is one possible solution:
   1: #include
   2: int Add (int first, int second)
   3: {
   4: std::cout << “In Add(), received “ << first << “ and “ << second
   ➥<< “\n”;
   5: return (first + second);
   6: }
   7:
   8: int Subtract (int first, int second)
   9: {
   10: std::cout << “In Subtract(), received “ << first << “ and “
   ➥<< second << “\n”;
   11: return (first - second);
   12: }
   13:
   14: int main()
   15: {
   16: using std::cout;
   17: using std::cin;
   18:
   19: cout << “I’m in main()!\n”;

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