Computer Science A - 9/28/99 int main() { apstring str; ofstream outfile("labOut.txt"); ifstream infile("labIn.txt"); do { getString(str, infile); displayString(str, outfile); } while(str != "stop"); infile.close(); outfile.close(); . . . void getString(apstream& str, ifstream& infile) getline(infile, str); void displayString(apstring str, ofstream& outfile) { cout<