Stack in C (Advanced)

/* Here we create two stack. First we push some data in our first stack. Then if we pop any data from our first stack that will be pushed in our second stack. So we will not lose any data. There are two different display function for two different stack. */

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


/*Node*/
struct Node{
    int data;
    struct Node *next;
}*node;

/*Head*/
struct Head{
    int count;
    struct Node *p;
}*head1,*head2;

/*Create Head 1*/
void create_head1(){
    head1 = (struct Head*)malloc(sizeof(struct Head));
    head1->count = 0;
    head1->p = NULL;
}

/*Create Head 2*/
void create_head2(){
    head2 = (struct Head*)malloc(sizeof(struct Head));
    head2->count = 0;
    head2->p = NULL;
}

/*Display1*/
void display1(){
    struct Node *temp;
    temp = head1->p;
    printf("\nDisplay 1:\n");
    printf("-------\n");
    while(temp != NULL){
        printf("Data: %d\n", temp->data);
        temp = temp->next;
    }
    printf("-------\n\n");
}

/*Display2*/
void display2(){
    struct Node *temp;
    temp = head2->p;
    printf("\nDisplay 2:\n");
    printf("-------\n");
    while(temp != NULL){
        printf("Data: %d\n", temp->data);
        temp = temp->next;
    }
    printf("-------\n\n");
}

/*Display Top1*/
void display_top1(){
    if(head1->p == 0){
        printf("\nNothing to display.\n");
    }
    else{
        struct Node *top;
        top = head1->p;
        printf("Top data: %d\n",top->data);
    }
}

/*Display Top2*/
void display_top2(){
    if(head2->p == 0){
        printf("\nNothing to display.\n");
    }
    else{
        struct Node *top;
        top = head2->p;
        printf("Top data: %d\n",top->data);
    }
}

/*Push 1*/
void push1(){
node = (struct Node*)malloc(sizeof(struct Node));
printf("Enter data: ");
scanf("%d",&node->data);
node->next = head1->p;
head1->p = node;
head1->count++;
}

/*Push 2*/
void push2(int x){
node = (struct Node*)malloc(sizeof(struct Node));
node->data = x;
node->next = head2->p;
head2->p = node;
head2->count++;
}

/*Pop*/
void pop(){
    if(head1->count == 0){
        printf("No data for pop.\n");
    }
    else{
        struct Node *temp;
        int d;
        temp = head1->p;
        head1->p = temp->next;
        d = temp->data;
        free(temp);
        push2(d);
        head1->count--;
    }
}

int main(){
    create_head1();
    create_head2();
    printf("Stack\n");
    int n;
    while(1){
        printf("\nPress 1 for push.\n");
        printf("Press 2 for pop.\n");
        printf("Press 3 for display.\n");
        printf("Press 4 for display top.\n");
        printf("Press 0 for close program.\n\n");

        scanf("%d",&n);

        if(n == 1){
            push1();
        }
        else if(n == 2){
            pop();
        }
        else if(n == 3){
            printf("Press 1 for display 1.\n");
            printf("Press 2 for display 2.\n");
            int d;
            scanf("%d",&d);
            if(d == 1){
                display1();
            }
            else if(d == 2){
                display2();
            }
        }
        else if(n == 4){
            printf("Press 1 for display top1.\n");
            printf("Press 2 for display top2.\n");
            int dt;
            scanf("%d",&dt);
            if(dt == 1){
                display_top1();
            }
            else if(dt == 2){
                display_top2();
            }
        }
        else if(n == 0){
            printf("Thank You.");
            break;
        }
        else{
            printf("Invalid Input!\n");
            printf("Try Again\n");
        }
    }
    return 0;
}