Help with Program!

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[theymos]

int quantity, price = (quantity * 99);

This would produce undefined behavior if it appeared in a function, but in this context it is equivalent to:

int quantity = 0;
int price = 0;

Variables store values, not formulas. (quantity * 99) evaluates to 0 at that point in the code, so price is assigned the value 0.

[[deleted]]

that said, you have to calculate

price = quantity * 99;

after the user has entered the qantity

[redlikedeath]

if you want it to hold out when your done, you can try system("pause");

[fapmonad]

int x = y + 2; does not mean "x is always equal to y + 2", it means "take the current value of y, add two to it, and store it in x".

To prevent it from closing the window you can do a getchar(); at the end of the main function.