stack

#include<stdio.h>
#include<stdlib.h>

struct Node
{
    int data;
    struct Node *next;
}*temp;

struct Head
{
    int count;
    struct Node *top;
}*head;



void PushNode(int data)
{
    if(head->top==NULL)
    {
        temp=(struct Node*)malloc(sizeof(struct Node));
        temp->data=data;
        temp->next=NULL;
        head->top=temp;
    }
    else{
        temp=(struct Node*)malloc(sizeof(struct Node));
        temp->data=data;
        temp->next=head->top;
        head->top=temp;
    }
    head->count++;

}


void PopNode()
{
     temp=head->top;

    if(temp==NULL)
    {
        printf("ERROR!!!\n Empty stack");
        return;
    }
    else{

        head->top=temp->next;
        printf("delated value is %d",temp->data);
        free(temp);
        head->count--;
    }

}

void createStack()
{
    head=(struct Head*)malloc(sizeof(struct Head));
    head->count=0;
    head->top=NULL;

}

void checkTop()
{

  temp=head->top;

    if(temp==NULL)
    {
        printf("Empty Stack");

    }
    else
    {
        printf("\ntop of the stack is %d",temp->data);
    }
}


void show()
{
    int i;
    temp=head->top;
    for(i=1;i<=head->count;i++)
    {
        printf("\n%d",temp->data);
        temp=temp->next;
    }
}



int main()
{
    int choice,data;
/*    createStack();
    PushNode(9);
    PushNode(11);
    PushNode(16);
    PushNode(19);
    show();
    PopNode();
    show();
    checkTop();
*/
createStack();
while(1)
{

printf("\npress 1 for push node\n");
printf("press 2 for pop node\n");
printf("press 3 for stack top\n");
printf("press 4 for check stack\n");
scanf("%d",&choice);
switch(choice)
{
    case 1:
            printf("enter data\n");
            scanf("%d",&data);
             PushNode(data);
             break;
     case 2:

             PopNode();
             break;

     case 3:
            checkTop();
            break;
     case 4:
            show();
     default:
         printf("nothing to show");
         break;


}


}

}