c program for stack

#include <stdio.h>
#include <stdlib.h>
#define max 10
//defining basic requirements like array for stack implementation
//top pointer or handler
//x to get the value that is to be pushed to the stack
int s[max],top=-1,x;
//making a push function for pushing x to the array
void push(void)
{
    //checking overflow condition in the stack
if(top>=max)
    {
    printf("Error:Hey We Are Running Out Of Space");
    }

    //incrementing the pointer
top++;
s[top]=x;
printf("hey i just pushed %d to position %d",x,top);

}
void scan()
{
    //scanning the element that has to be pushed to the stack
printf("Hey Enter The Element To Be Pushed To The Stack\n");
scanf("%d",&x);
push();
}

void pop(void)
{
    //checking underflow condition
if(top==-1)
    {
    printf("\n error:stack underflow so nothing to delete \n");

    }
//decrementing the position of the top pointer
top--;
printf("\n I just pushed off %d from the stack\n",s[top+1]);
}
int main()
{
    //calling the functions
scan();
pop();

//so we have to implement stack .

//returning 0 as our main functions return type is an integer
    return 0;
}