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How to reverse a string using a recursive function, without
swapping or using an extra memory?
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Answer Posted / moinom
#include <iostream>
#include <conio>
void reverse(char a[], int s, int sc );
void reverse(char a[], int s, int sc ){
if ((sc-s)<(s-1))
{
a[sc-s]^=a[s-1];
a[s-1]^=a[sc-s];
a[sc-s]^=a[s-1];
reverse (a, s-1, sc) ;
}
}
void main (){
char a[]="ABCDEFG";
reverse(a, 7, 7);
cout<<a;
getch(); //i just use it to freeze the screen
}
| Is This Answer Correct ? | 14 Yes | 29 No |
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