this soln may fail on -ve number
i havenot tried ..
but the basic funda is this ..
On Sun, Sep 13, 2009 at 11:23 AM, ankur aggarwal
<ankur.mast....@gmail.com>wrote:
> size of char is 1 byte but that of int is 4
> If i use int then output for a,b will be a+4*b
>
> in the program the value of ptr is a after the assignment
> address of ptr[c] will be ptr +c*sizeof(type)
> if the type is char then it equals a+c*1=a+c
>
> value of ptr is stored as a hexadecimal number
> so the use (int)ptr in last line
>
> That is why it outputs the sum
> size of char is 1 byte but that of int is 4
> If i usize of char is 1 byte but that of int is 4
> If i use int then output for a,b will be a+4*b
>
> in the program the value of ptr is a after the assignment
> address of ptr[c] will be ptr +c*sizeof(type)
> if the type is char then it equals a+c*1=a+c
>
> value of ptr is stored as a hexadecimal number
> so the use (int)ptr in last line
>
> That is why it outputs the sum
> se int then output for a,b will be a+4*b
>
> in the program the value of ptr is a after the assignment
> address of ptr[c] will be ptr +c*sizeof(type)
> if the type is char then it equals a+c*1=a+c
>
> value of ptr is stored as a hexadecimal number
> so the use (int)ptr in last line
>
> That is why it outputs the sum
>
> int main() {
>
>> int a,b;
>>> cin>>a>>b;
>>>
>>> char *ptr = (char *) a;
>>> char *ptr2 = &ptr[b];
>>> cout<< (int) ptr2 <<endl;
>>> return 0;
>>> }
>>>
>>>
>>>
>>>
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