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How to reverse a string using a recursive function, without
swapping or using an extra memory?

Answer Posted / asif

#include <stdio.h>
#include <string.h>

void reverse(char *str)
{
if (*str == '\0')
return;

reverse(str+1);

printf("%c", *str);
}

int main()
{
char str[50];
char *ptr;
printf("Enter the string: ");
//scanf("%s", str);
fgets(str,50,stdin);
ptr = strchr(str,'\n');
*ptr = '\0';

printf("Reversed string: ");
reverse(str);
printf("\n");

return 1;
}

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