How to make getline command work in a while loop? [duplicate] - c++

Question

This question already has answers here:
Why does std::getline() skip input after a formatted extraction?
(5 answers)
Closed 3 years ago.
I use getline command in a while loop. The command works fine in the first loop. But after the second loop, it just passes the getline commands and doesn't allow me to enter
I tried cin.get and cin.getline but the problem is not fixed
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int price;
void addItem(){
string product;
cout << "Please enter product's name: " << endl;
getline(cin, product);
cout << "Please enter product's price: " ;
cin >> price;
cout << "You have added " << product << " with a price of $" << price << " to your cart." << endl;
}
int main() {
char answer = 'y';
int total = 0;
while (answer == 'y'){
addItem();
total += price;
cout << "Do you want to add another product (y/n)? " ;
cin >> answer;
}
if (answer != 'y'){
cout << "Your total is $" << total << endl;
}
return 0;
}

Answer 1

Mixing cin >> with getline(cin,...), so you should to avoid it. I assume that you used getline to read product name which contain spaces inside. You could rewrite your code to use only getline which should give you expected behavior:
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int price = 0;
void addItem(){
string product{};
string price_str{};
cout << "Please enter product's name: " << endl;
getline(cin, product);
cout << "Please enter product's price: " ;
getline(cin,price_str);
/*CHECK IF price_str is number before calling stoi*/
price = stoi(price_str);
cout << "You have added " << product << " with a price of $" << price << " to your cart." << endl;
}
int main() {
string answer = "y";
int total = 0;
while (answer == "y"){
addItem();
total += price;
cout << "Do you want to add another product (y/n)? " ;
getline(cin,answer);
}
if (answer != "y"){
cout << "Your total is $" << total << endl;
}
return 0;
}

Answer 2

try
while(cin>>answer && answer !='y'){
cout<<"enter again \n";
}
cout<<"ok";