#include <stdio.h>
#include <stdio.h>
#define max 5
static int stack[max];
int top=-1;
void push(int x)
{
 stack[++top]=x;
}
int pop()
{
 return(stack[top--]);
}
void()
{
 int i;
 if(pop<0)
 printf("stack empty")
 else
 {
 printf("\n top-->");
 for(i=top;i>0;i--)
 {
 printf("%ud",stack[i]);
 }
 printf("\n");
 }
 main()
 {
 int ch=0,val;
 clrscr();
 while(ch!=u)
 {
 printf("\n stack operations");
 printf("1.PUSH");
 printf("2.POP");
 printf("3.VIEW");
 printf("4.QUIT \n");
 printf("enter the choice");
 scanf("%d",&ch);
 switch(ch)
 {
 case 1:
 if (top<max-1)
 {
 printf("\enter the stack element ");
 scanf("%d",&val);
 }
 else
print("\n stack overflow\n\n");
break;
case 2:
if (top<0)
printf("\n stack underflow");
else
{
val=pop();
printf("\n popped element is %d \n",val);
}
break;
case 3:
view()
break;
case 4:
exit(0);
default:
printf("\n invalid choice");
 
 }
 }
}
 
 
 
 
 

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