Point out the error in the following program.

#include<stdio.h>
#include<stdarg.h>
void display(char *s, ...);
void show(char *t, ...);

int main()
{
    display("Hello", 4, 12, 13, 14, 44);
    return 0;
}
void display(char *s, ...)
{
    show(s, ...);
}
void show(char *t, ...)
{
    int a;
    va_list ptr;
    va_start(ptr, s);
    a = va_arg(ptr, int);
    printf("%f", a);
}

#include<stdio.h>

int main()
{
    char huge *near *far *ptr1;
    char near *far *huge *ptr2;
    char far *huge *near *ptr3;
    printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3));
    return 0;
}

#include<stdio.h>

int main()
{
    struct node
    {
        int data;
        struct node *link;
    };
    struct node *p, *q;
    p = (struct node *) malloc(sizeof(struct node));
    q = (struct node *) malloc(sizeof(struct node));
    printf("%d, %d\n", sizeof(p), sizeof(q));
    return 0;
}

#include<stdio.h>

int main()
{
    int arr[] = {12, 13, 14, 15, 16};
    printf("%d, %d, %d\n", sizeof(arr), sizeof(*arr), sizeof(arr[0]));
    return 0;
}

void *cmp();