#include
#include
#include
using namespace std;
enum { sum = 1, difference, product, quotient };
int getInt(int minValid = LONG_MIN, int maxValid = LONG_MAX);
int main(int argc, char *argv[]) {
? ? int first_number, second_number, choice;
? ? cout << "Enter " << sum << " for sum, " << difference
? ? ? ? ? ? ? << " for difference, " << product << " for product or "
? ? ? ? ? ? ? << quotient << " for quotient: " ;
? ? choice = getInt(sum, quotient);
? ? cout << "Please enter your first number: ";
? ? first_number = getInt();
? ? while (true) {
? ? ? ? cout << "Please enter your second number: ";
? ? ? ? second_number = getInt();
? ? ? ? if ((choice == quotient) && (second_number == 0)) {
? ? ? ? ? ? cout << "Sorry, you can't divide by zero" << endl << endl;
? ? ? ? } else {
? ? ? ? ? ? break;
? ? ? ? }
? ? }
? ? if (choice == sum) {
? ? ? ? cout << "The sum is: " << first_number + second_number;
? ? }
? ? if (choice == difference) {
? ? ? ? cout << "The difference is: " << first_number - second_number;
? ? }
? ? if (choice == product) {
? ? ? ? cout << "The product is: " << first_number * second_number;
? ? }
? ? if (choice == quotient) {
? ? ? ? cout << "The quotient is: " << static_cast
? ? }
? ? cout << endl << endl;
? ? return 0;
}
int getInt(int minValid, int maxValid) {
? ? stringstream ss;
? ? string line;
? ? bool inputOk = false;
? ? int n;
? ? do {
? ? ? ? getline(cin,line);
? ? ? ? ss.clear(); ss.str(line);
? ? ? ? if ((!(ss >> n)) || (n < minValid) || (n > maxValid) || (ss.good())) {
? ? ? ? ? ? cout << endl << "invalid input, try again" << endl << "> ";
? ? ? ? } else {
? ? ? ? ? ? inputOk = true;
? ? ? ? }
? ? } while (inputOk == false);
? ? return n;
}
#if 0
Sample run:
Enter 1 for sum, 2 for difference, 3 for product or 4 for quotient: 4
Please enter your first number: 3
Please enter your second number: 0
Sorry, you can't divide by zero
Please enter your second number: 4
The quotient is: 0.75
#endif
Yeah you weren't really clear there..
Okay...what do you need help with?
