[kingo]

I need to right a recursion program to reverse a string
the condition is
it should be only line
tht line code should be of returning the value

[shabbir]

Really interesting

#include <iostream.h>
#include <string.h>


void RevStr(char *inArr, char *outArr,int start,int cLen)
{
	((*(outArr+start) = inArr[cLen-1]) && (cLen > 0))?RevStr(inArr, outArr, start+1, cLen-1):0;
}


int main()
{
	char * ptr = "Go4Expert";

	char *outptr = 0;

	outptr = new char[strlen(ptr) + 1];

	RevStr(ptr, outptr, 0, strlen(ptr));
 
	cout<<outptr;

	return 0;
}

[kingo]

I mean tht one line code should be of returning type.................I am not able to figure it out

[shabbir]

This one line is of returning type but as the function does not need to return anything and so it does not have a return statement.

((*(outArr+start) = inArr[cLen-1]) && (cLen > 0))?RevStr(inArr, outArr, start+1, cLen-1):0;

[kingo]

k thanx

[shabbir]

Quote:

Originally Posted by kingo

k thanx

My pleasure.

Also with the return statement heres the code.

#include <iostream.h>
#include <string.h>


int RevStr(char *inArr, char *outArr,int start,int cLen)
{
	return(((*(outArr+start) = inArr[cLen-1]) && (cLen > 0))?RevStr(inArr, outArr, start+1, cLen-1):0);
}


int main()
{
	char * ptr = "Go4Expert";

	char *outptr = 0;

	outptr = new char[strlen(ptr) + 1];

	RevStr(ptr, outptr, 0, strlen(ptr));
 
	cout<<outptr;

	return 0;
}