Q: What is the output of this C code?

    #include <stdio.h>
    struct point
    {
        int x;
        int y;
    };
    struct notpoint
    {
        int x;
        int y;
    };
    void foo(struct point);
    int main()
    {
        struct notpoint p1 = {1, 2};
        foo(p1);
    }
    void foo(struct point p)
    {
        printf("%d\n", p.x);
    }