Question

I want the user to enter a string, double and a long, but the thing is after the first time, the string is kind of being ignored and left empty and prompting for the double directly.

here’s my code:

#include <iostream>
#include <string>

using namespace std;

int main () {
    string name;
    double price;
    long serial;

    cout << "Enter the dvd's name: "; getline(cin, name);
    cout << "Enter the dvd's price (in $): "; cin >> price;
    cout << "Enter the dvd's serial number: "; cin >> serial;

    cout << endl;

    cout << "Enter the dvd's name: "; getline(cin, name);
    cout << "Enter the dvd's price (in $): "; cin >> price;
    cout << "Enter the dvd's serial number: "; cin >> serial;

    return 0;
}

as you can see the first time, i can enter a string the second time just sends me directly to the double, and even if i ignored the missing string, and put a double and then a long, it will print name as empty string.

What is wrong with my code?

Answer 1

I generally use istringstream in such cases (as shown below). But a better solution would be to use cin.ignore

#include <sstream>

int main () {
    string name,line;
    double price;
    long serial;

    cout << "Enter the dvd's name: "; getline(cin, line);
    name = line;
    cout << "Enter the dvd's price (in $): ";
    getline(cin,line);
    istringstream(line)>>price;
    cout << "Enter the dvd's serial number: ";
    getline(cin,line);
    istringstream(line)>>serial;
    cout << endl;
    return 0;

}