My program skip getting input data? [duplicate]

Answer 1

you can remove the buy variable from the printf call, it's unneeded

printf ("\nWould you like to buy a beer (y/n) ?",buy);

And replace char buy by char buy[2]; . because a sting is always terminated by /0.

You can also add a memset (buy, 0, sizeof(buy)), to be sure that memory is reset before you start to use it.