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write a C code
to reverse a string using a recursive function, without
swapping or using an extra memory.
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Answer Posted / mohan
#include <stdio.h>
#include <string.h>
void reverse(char **s, int start, int last)
{
char tmp;
if (start >= last)
return;
char *s2 = *s;
tmp = s2[start];
s2[start] = s2[last];
s2[last] = tmp;
reverse(s, start + 1, last - 1);
}
int main()
{
char *s = strdup("Hello World");
printf("%s\n", s);
reverse(&s, 0, strlen(s) - 1);
printf("%s\n", s);
}
| Is This Answer Correct ? | 5 Yes | 1 No |
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