what is wrong in this program?

Question

https://code.sololearn.com/c1BP5NsspYMH/?ref=app

Answer 1

//add prototypes for isFull,isempty functions
int isFull();
int isEmpty();

scanf("%d", &stack_size); //use &stack_size, not stack_size

printf("Enter the size of stack : %d" , stack_size); //not stack_array

Just These 4 changes need to work it correctly....
Edit :
use int main() {...} not void here