pop double stack
#include <stdio.h>
#define MAXSIZE 100
int sp = 0;
double stack[MAXSIZE];
void push(double f)
{
if (sp < MAXSIZE)
stack[sp++] = f;
else
printf("error: stack is full\n");
}
double pop()
{
if (sp > 0)
return stack[--sp];
else
{
printf("error: stack is empty\n");
return 0;
}
}