assigning to void pointers

[askcq]

main() {
void *poin;
unsigned int value;
value =1000;
printf("%u\n",value);
*(unsigned int *)poin=(unsigned int)value;
printf("%u\n",*poin);

}


is my way of assigning a value to convert void ppointer to any type is wrong...
pls help

[pradeep kaltari]

main() {
void *poin;
unsigned int value;
value =1000;
printf("%u\n",value);
*(unsigned int *)poin=(unsigned int)value;
printf("%u\n",*poin);

}


is my way of assigning a value to convert void ppointer to any type is wrong...
pls help

Hi,
The assignment to the void pointer doesn't have any problem but the way you are trying to print the value using the pointer is incorrect.

To need to cast the pointer to unsigned integer pointer and then access the value contained in the location to which it is pointing.
Try the following:

void *poin;
unsigned int value;
value =1000;
printf("%u\n",value);
*(unsigned  int *)poin=(unsigned int)value;
printf("%u\n",*(unsigned int *)poin);
 

I hope this helps you.

Regards,
Pradeep

[Banfa]

main() {
void *poin;
unsigned int value;
value =1000;
printf("%u\n",value);
*(unsigned int *)poin=(unsigned int)value;
printf("%u\n",*poin);

}


is my way of assigning a value to convert void ppointer to any type is wrong...
pls help

Actually this is a big problem, you have dereferenced the pointer poin without actually pointing it at any memory.

poin will have a random value when you enter main so you could be writing anywhere in memory.

Your casting of the void pointer is OK but you need to allocate the pointer some memory before copying anything to it.