Answer Posted / d g patel

/* Following code does as intended */
#include <stdio.h>

#define REVERSE_STRING(X) Rstring(X, *(X), strlen(X)-1)

void Rstring( char *str, char c, int index )
{
if( index != 0 )
Rstring( str, *(str+(strlen(str))-index),
index-1);
*(str+index) = c;
}

int main( void )
{
char str[] = "Dharmendra Patel";
printf("Actual string is [%s]\n", str);
REVERSE_STRING(str);
printf("Reversed string is [%s]\n", str);
return 0;
}

How to write a code for implementing my own printf() and scanf().... Please hep me in this... I need a guidance... Can you give an coding for c... Please also explain about the header files used other than #include...

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