Why is output 323? Not 321

Question

https://code.sololearn.com/cZ71BDXPabYQ/?ref=app

Answer 1

First loop: // c is "123"
c[0] = c[2];
c is "323".

Second loop: // c is "323"
c[1] = c[1];
c is "323".

Third loop: // c is "323"
c[2] = c[0];
c is "323"

Ends

You can get "321 if you copy the original string to another variable.

Answer 2

Try to print string <c> inside the loop after you do character swap. You'll see why that is happening 👍

Answer 3

Because you have overwritten c[0]

Answer 4

This works...

#include <iostream>
using namespace std;

int main() {
string c= "123";
int a = c.length()-1;
string b=c;
for (int i=0; i<=a; i++) {
c[i]= b[a-i];
}
cout<<c;
return 0;
}

Answer 5

Quantum, It turns out that the larger array overlaps the smaller one ( c[0]=c[2] out c[2] and c[2]=c[0] out c[2])?

Answer 6

Exactly, because you have overwritten the original value you are trying to assign.