C Programming - Pointers - Discussion

Nice explanation, Thanks @Nilesh.

Thanks @Nilesh.

Thanks @Nilesh well explained!

Hi sourav,
Typecasting is making a variable of one type, such as an int, act like another type, a char, for one single operation. To typecast something, simply put the type of variable you want the actual variable to act as inside parentheses in front of the actual variable. (char)a will make 'a' function as a char.

#include <iostream>

using namespace std;

int main()
{
cout<< (char)65 <<"\n";
// The (char) is a typecast, telling the computer to interpret the 65 as a
// character, not as a number. It is going to give the character output of
// the equivalent of the number 65 (It should be the letter A for ASCII).
cin.get();
}

ch=74 which is the ASCII value of J
j=65 which is the ASCII value of A
vp a void pointer contains the address of ch so it can be type casted to any type of pointer.
printf("%c", *(char*)vp);
(char*)vp type castes void type vp to char type and prints the value pointed by vp which is J.
vp=&j;
printf("%c", *(int*)vp);
Now vp contains the address of j.
*(int*)vp it type castes void type pointer vp to int type and prints the value pointed by vp which is A
vp=cp;
printf("%s", (char*)vp+2);
Now vp contains the value of cp. pointer vp is incremented by 2.so now it points to the letter C of JACK and prints the string CK.

So finally JACK is printed.

Thanks Nilesh, nice explanation.

Thanks Nilesh. Well explained.

q = (int**)&p;
Here void ptr is casted into integer ptr.

this was d explantion given for typecasting in 1 of the discussion...

*(char*)vp-dis is also typecasting.. but both differs..

For @Lucky:

ch is a character variable. From the character set, we can assign any kind of values to the character variable. The character set consists of floating point no. s, integers, characters, special characters etc. which when given charater datatype behave as character.

Thank you very much Nilesh.