Dereference void pointer

Question

Even after casting a void pointer, I am getting compilation error while dereferencing it. Could anyone please let me know the reason of this.

int lVNum = 2;
         


        

Answer 1

@ Code-Guru I tried to compile it in visual studio. It gives error - expression must be a pointer to complete object.

Thanks teppic, As you suggested, the following compiles and yields right result.

#include

void main(){

printf("study void pointers \n");

int lvnum = 2;
void *lvptr;
lvptr = &lvnum;
printf("\n lvptr is %d\n",((int *)lvptr)[0]);


}

However if I try printf("\n lvptr is %d\n",((int *)lVptr)[60]); It compiles and runs but gives random number.

Thanks a lot, friends for all the suggestions. Apologies that I assigned a void pointer to unnecessarily casted int pointer and expected it to get dereferenced. However I should have casted it when I want to dereference it.

Purpose of the snippet: In my sources I found klocwork error which was caused by similar situation. On the contrary the program not only compiled but also gave correct results. Reason- it is a low level code (no OS) where the memory assigned to the void pointer is already reserved till the count of like 60. But the klocwork tool was unable to parse the files having that limit resulting in error. I did a lot of brain storming and ended up in something silly.

Saurabh