removing_spaces_from_string

#include <bits/stdc++.h>

using namespace std;

char * remove_spaces(char * str)
{
    int i = 0, j = 0;
    
    while (str[i])
    {
        if ( str[i] != ' ')         // if (str[i] != ' ') 
        {
          str[j++] = str[i] ;
        }
        i++  ;
    }
    str[j] = '\0';
    return str ;
}

int main() {
    cout << "Hello World!\n";
    
    char str1[] = " g e e k s " ;
    
    cout << remove_spaces(str1) << endl;
    
    return 0;
}