Thread: Void Pointers

As per my knowledge , arithmetic operations on void pointers is not allowed unless properly typecasted.

Code:

int main(){
    float i = 10;
    void *k;
    k = &i;
    printf("%u \n" , k);
    k = k-4;
    printf("%u\n" ,k);
    getch();
    return 0;
}

However the above code always increments , decrements the void *k properly without any error or warning.
For a single increment , it takes the address value from, example 227315 to 227316.
Hows this thing working ?

Using gcc? It's non-standard gcc extension. don't use it.
GCC will do pointer arith on void pointer.(as char pointer).
Try to compile with -Wall -pedantic-errors -std=c89 # or -std=c99

Take note that it only incremented by 1 byte (the default) not the size of a float.

A void pointer has no explicit type.