#include <stdio.h>
#include <limits.h>

typedef struct {
    int a;
} A;
 
typedef struct {
    int b;
    float c;
} B;


int main() {

    // Casting. Example 1
    int a=3;
    float b=4.3;
    unsigned long l=LONG_MAX;

    printf("%d %f ", (int)b, (float)a); 
    printf("%ld %hu\n", l, (unsigned short)l);

    // Casting. Example 2
    int array[10];
    int *p1 = &array[1];
    int *p2 = &array[2];
    printf("%d ", p2 - p1);  // Prints 1
    printf("%d\n", (char*)p2 - (char*)p1); // Prints 4
 
    // Casting. Example 3
    A sa;
    A *p_sa = &sa; 
    //(B)sa;             // -> Does not compile ("conversion to non-scalar type requested")
    ((B*)p_sa)->c = 5.6;  // -> Compiles just fine even if ERRONEOUS

    //B* p_sb = p_sa;    // -> Does not compile ("incompatible pointer types")
    B* p_sb = (B*)p_sa;
    printf("Wrong: %d %f\n", p_sb->b, p_sb->c);

    return 0;

}