[C Programming] Stack

 

#include <stdio.h>
#include <stdbool.h>

#define STACKSIZE 10

int top = -1;

bool isEmpty(void)
{
return top == -1;
}

bool isFull(void)
{
return top == STACKSIZE - 1;
}

void push(int* stack, int data)
{
if (!isFull())
{
stack[++top] = data;
printf("top:%d->data:%d\n",top,stack[top]);
}
else
{
printf("Full\n");
}
}

int pop(int* stack)
{
if (!isEmpty())
{
return stack[top--];
}
else
{
printf("Empty\n");
}
}

int peek(int* stack)
{
if (!isEmpty())
{
return stack[top];
}
else
{
printf("Empty\n");
}

}

int main(void)
{
int stack[10] = { 0 };
for (size_t i = 0; i < STACKSIZE; i++)
{
push(stack, i);
}
printf("peek!: %d\n", peek(stack));
for (size_t i = 0; i < STACKSIZE; i++)
{
printf("pop!: %d\n",pop(stack));
}

return 0;
}