Stack

#define MAX 10
typedef struct stack
{
char data[MAX];
int top;
}stack;
void init(stack *s)
{ s->top=-1;
}

int empty(stack *s)
{ if(s->top==-1)
return(1);
return(0);
}

int full(stack *s)
{ if(s->top==MAX-1)
return(1);
return(0);
}

void push(stack *s,char x)
{
s->top=s->top+1;
s->data[s->top]=x;
}

char pop(stack *s)
{
char x;
x=s->data[s->top];
s->top=s->top-1;
return(x);
}
void print(stack *s)
  { int i;
    printf("\n");
    for(i=s->top;i>=0;i--)
       printf("%c  ",s->data[i]);
  }