Sams Teach Yourself C++ in 21 Days

Answers 861

D

3. The following is one possible solution:
   0: // Ex1703.cpp
   1: #include
   2: using namespace std;
   3:
   4: int main()
   5: {
   6: char ch;
   7: cout << “enter a phrase: “;
   8: while ( cin.get(ch) )
   9: {
   10: switch (ch)
   11: {
   12: case ‘!’:
   13: cout << ‘$’;
   14: break;
   15: case ‘#’:
   16: break;
   17: default:
   18: cout << ch;
   19: break;
   20: }
   21: }
   22: return 0;
   23: }


4. The following is one possible solution:
   0: // Ex1704.cpp
   1: #include
   2: #include
   3: using namespace std;
   4:
   5: int main(int argc, char**argv) // returns 1 on error
   6: {
   7: if (argc != 2)
   8: {
   9: cout << “Usage: argv[0] \n”;
   10: return(1);
   11: }
   12:
   13: // open the input stream
   14: ifstream fin (argv[1],ios::binary);
   15: if (!fin)
   16: {
   17: cout << “Unable to open “ << argv[1] <<” for reading.\n”;
   18: return(1);
   19: }
   20:
   21: char ch;
   22: while ( fin.get(ch))

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