C Programming - Pointers - Discussion

Thanks Nilesh. Well Explained.

Thank you Nilesh :).

Thanks nilesh. :).

Thanks nilesh.

Thanks nilesh.

Hi,

Can anybody say, how you are telling ASCII values like 74=j and 65=a old tel me.

Explanation :
printf ("%c", * (int*) vp) ;
Here vp is a void pointer (void * vp)that can hold address of all type of variable.
Lets take an example
void *vp; // void pointer declaration
int a=5; // declaration of variable and assigned to 5
vp=&a;
Normally to show the value of the variable through pointer, we are just appending * before pointer i.e printf("%d",*p) that means it will show value at p . but here it will not show if we will declare like the above. Because vp is a void pointer that means it can hold all data type address .if we simply place *vp then compiler does not identify ..So for that we have to type cast ie (int *)vp ..it indicates vp hold the integer address only .if we wan to see that value just place * (int *)vp..
Then you will get the value of variable..but here %c format specifier used so it will convert that integer value to character value
A-Z(65-90)
a-z (92-122)
0-9 (48-57)

Thanks

Hi satya.

This mens, the pronunciation of pointer alwys strt from right to left, so firstly we typecast the vp because vp is othr datatype of pointer nd we want to intgr pointer so we use typecasting nd aftr tht we solve *vp (mens value at vp or value at adress stored in vp).

Thanks nilesh bro.

Thanks Nilesh. Well explained.