Subtracting two pointers giving unexpected result

Question

#include 

int main() {
    int *p = 100;
    int *q = 92;
    printf(\"%d\\n\", p - q);  //prints 2
}

Shouldn\'t the output of above pr

Answer 1

This

int *p = 100;
int *q = 92;

is already invalid C. In C you cannot initialize pointers with arbitrary integer values. There's no implicit integer-to-pointer conversion in the language, aside from conversion from null-pointer constant 0. If you need to force a specific integer value into a pointer for some reason, you have to use an explicit cast (e.g. int *p = (int *) 100;).

Even if your code somehow compiles, its behavior in not defined by C language, which means that there's no "should be" answer here.