Can anyone explain what is wrong with this code

Question

https://code.sololearn.com/clQc2NNyQT3k/?ref=app

Answer 1

factorial of 15 is a big number that is not fit to int variable.
Use long long int type instead of int. Also replace format specifiers with %lld

Answer 2

Thanks

Answer 3

Thanks

Answer 4

variable k in function fact() is not initialized.
line #33 should be
int k = 1,i;

Answer 5

Now it's working it's not giving the expected output if input >14
Why?

Answer 6

Now you code can generate 20 lines. With some refactoring you can do 30. Without using big int.