While Loop In C++ - c++

Question

Guys I Want Help Regarding Code Below, I Want To Add A While Loop In Which A User Keeps Getting The Else Statement's Cout. Until User Satisfies If or Else-If Condition. In Other Words The Program Should Only End When User Writes 'g''G''b''B' Other Wise It Should Keep Showing The Else's Cout With Asking Again To Put The Right Value.
#include <iostream>
using namespace std;
int main()
{
string item;
float price;
int quantity;
float total;
char experience;
cout << "Write The Name Of Item You Want To Buy:" << endl;
getline(cin, item);
cout << "What Is The Price Of " << item << " In Dollars $ ?" << endl;
cin >> price;
cout << "What Is The Quantity Of " << item << endl;
cin >> quantity;
total = price*quantity;
cout << "Your Total Bill For " << quantity << " " << item << " Is " << total << "$" << endl<< endl;
cout << "How Was Your Shopping Experience Write (G) If Good And (B) For Bad" << endl;
cin >> experience;
if (experience == 'g' || experience == 'G')
{
cout << "We Appreciate Your Feedback THANKS For Shopping :)";
}
else if (experience == 'b' || experience == 'B')
{
cout << "Sorry For Bad Experience, We Will Do Better Next Time THANKS For Shopping :)";
}
else
{
cout << "Write \"G\" If Good And \"B\" If Bad";
}

Answer 1

Here's the answer, you should prompt for input, then check the input using a while loop instead of IF-ELSE to make sure the user provided the answer you desired. This is actually a simple logic question tho. You may explore do-while loop too.
#include <iostream>
using namespace std;
int main()
{
string item;
float price;
int quantity;
float total;
char experience;
cout << "Write The Name Of Item You Want To Buy:" << endl;
getline(cin, item);
cout << "What Is The Price Of " << item << " In Dollars $ ?" << endl;
cin >> price;
cout << "What Is The Quantity Of " << item << endl;
cin >> quantity;
total = price*quantity;
cout << "Your Total Bill For " << quantity << " " << item << " Is " << total << "$" << endl<< endl;
cout << "How Was Your Shopping Experience Write (G) If Good And (B) For Bad" << endl;
cin >> experience;
while (experience != 'G' && experience != 'g' && experience != 'B' && experience != 'b') {
cout << "Write \"G\" If Good And \"B\" If Bad\n";
cin >> experience;
}
if (experience == 'g' || experience == 'G') {
cout << "We Appreciate Your Feedback THANKS For Shopping :)";
} else if (experience == 'b' || experience == 'B') {
cout << "Sorry For Bad Experience, We Will Do Better Next Time THANKS For Shopping :)";
}
return 0;
}