There is no error code, that's the problem, when I use the code below.
Everything worked fine until I added the code that is between the @@@@@@@@@@

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int main()
{
cout << "Hello World" << endl;
int a=5, b=20, c, d, e, f, age;
cout << "20-5=";
cout << b-a << endl;
string mystr;
string mystr2;
cout << "Hi, what's your first name?" << endl;
getline (cin, mystr);
cout << "Hi " << mystr << ", what a nice name!" << endl;
cout << "How old are you?" << endl;
cin >> age;
c=age*365;
d=c*24;
e=d*60;
f=e*60;
cout << "You have lived about:" << endl << age << " years." << endl << c << " days." << endl << d << " hours." << endl << e << " minutes." << endl << f << " seconds." << endl;
int i;
cout << "Enter a number: ";
cin >> i;
cout << "The number you entered is " << i << " and it's double is " << i*2 << endl << endl;

@@@@@@@@@@
float price=0;
int quantity=0;
cout << "Enter price: ";
getline (cin,mystr2);
stringstream(mystr2) >> price;
cout << "Enter quantity: ";
getline (cin,mystr2);
stringstream(mystr2) >> quantity;
cout << "Total price: " << price*quantity <<
endl;
@@@@@@@@@@
system("pause");
return 0;
}



The code on itself works, tested in a seperate project using only that code, but when including it in this code the output is that when asking for the price and quantity I see:
Price:Quantity:
Then I can only input something after the quantity, meaning that the result (price) is always 0 as I just can't input to price.

Anyone knows what I'm doing wrong?

This is a test program, I know there are different ways to do this but just this on itself isn't working and I'm trying for hours..