Reverse a string using single pointer

[nitinmhetre]

Hi,I want to reverse a string using single pointer.How to do this.Just give me an idea

[Happy_Reaper]

You could swap the first and last character of your string until you reach the middle. This will only use chars.

Or do you mean you want to use one additionnal pointer other than the one for the string (in which case, it would be much easier) ?

[KIBO]

If you can use an index you can swap the items starting at 0 and length-index-1 until half the string is reached

int index = 0;
int length = strlen(ptr);

// for half the string length

swap(ptr[index], ptr[length - index - 1]);
index++;