What seems the problem with my code?

Question

#include <iostream>
#include <ctype.h>
#include <string>
#include <algorithm>

using namespace std ;

int main (){

int i = 0;
char b[i];
string a, s;

getline(cin, a);

for (i = 0; i < a.length(); i++) {

b[i] = a[i];

if (isalpha(b[i])) {s = s +b[i];}
if (b[i] == ' ') {s = s+ " "; }

}

reverse(s.begin(), s.end());
cout << s;

}

Answer 1

Your char array is declared with size i, which is declared as 0 in the previous line. Therefore you cannot assign anything to b[i]. Based on what you are trying to do, I don’t believe that you need an array for char b. You may simply declare it as a variable to be assigned in your for loop.