Question

what would be the Output of this C Program and why

why plz try to explain

void fun(char *msg, ...);

int main()
{
fun("Variable argument", 1, 4, 7, 11, 0);
return 0;
}
void fun(char *msg, ...)
{
va_list ptr;
int num;
va_start(ptr, msg);
num = va_arg(ptr, int);
num = va_arg(ptr, int);
printf("\n help :");
printf("%d", num);