Why am I getting errors in my stack data structure? - c

Question

I decided to make a stack using C. I just wrote the code for a push function and now I'm getting errors (it says something is wrong with my maxsize).
I f you ask me everything seems just right, and I don't have any idea on what would the error might be.
#include <stdio.h>
#include <stdlib.h>
#define maxsize 100;
int top=-1, item;
int s[maxsize];
void push()
{
if (top == maxsize-1)
{
printf("Stack overflow\n");
return;
}
top = top + 1;
s[top] = item;
}
The error that I am getting is:-
stack.c:3:20: error: expected ']' before ';' token
#define maxsize 100;
^
stack.c:5:7: note: in expansion of macro 'maxsize'
int s[maxsize];
^~~~~~~
stack.c: In function 'push':
stack.c:3:20: error: expected ')' before ';' token
#define maxsize 100;
^
stack.c:9:16: note: in expansion of macro 'maxsize'
if (top == maxsize-1)
^~~~~~~
stack.c:9:8: note: to match this '('
if (top == maxsize-1)
^
stack.c:16:5: error: 's' undeclared (first use in this function)
s[top]=item;
^
stack.c:16:5: note: each undeclared identifier is reported only once
for each function it appears in

Answer 1

#define directives do not end with a ;. Change to #define maxsize 100

Answer 2

Use this code:
#include <stdio.h>
#include <stdlib.h>
#define maxsize 100
int top=-1,item;
int s[maxsize];
void push()
{
if (top == maxsize-1)
{
printf("Stack overflow\n");
return;
}
top = top + 1;
s[top] = item;
}
Here you used ; after the #define statement which caused the problem.