Pointers, casting and various compilers

Now I take a course in the ANSI C programming language and try to run this code from the lecturer's slider:

#include<stdio.h>

int main()
{
    int a[5] = {10, 20, 30, 40, 50};
    double *p;

    for (p = (double*)a; p<(double*)(a+5); ((int*)p)++)
    {
        printf("%d",*((int*)p));
    }

    return 0;
}

Unfortunately this will not work. On MacOS, Xcode, Clang, I get the error message: "Assignment to cast is illegal, lvalue casts are not supported"and on Ubuntu gcc I get the following error:"lvalue required as increment operand"

I suspect the problem is the compiler, since we are studying ANCI C, and it has its own requirements, which can lead to other standards.