Password mask c++

#include <iostream>
#include <stdio.h>
#include <stdlib.h>


/* compile using -std=c++17 */
using
std::cin,
std::cout,
std::endl,
std::string;

/* get input stright off cli
on keypress

https://replit.com/talk/learn/Detecting-keypresses-in-c-without-pressing-enter/28460


*/
int keypress() {
  system ("/bin/stty raw");
  int c;
  c = getc(stdin);
  system ("/bin/stty cooked");
  return c;
}



int main(){

string ast;
int d=0,key;

 do {
     key = keypress();
/* 13 is the ascii number
   for return key */
       if(key == 13)
           break;
#ifdef __linux__
   system("clear");
#elif __WIN32
  system("cls");
#endif

   cout << key << " ";
  /* keep adding * to string
    then update cli */
    ast +="*";

#ifdef __linux__
   system("clear");
#elif __WIN32
  system("cls");
#endif

std::cout << ast;
  d++;
  } while (1);

char c;
string password,
pwcheck="mypasswd";

cout<<"enter password\n";

/* loop condition: get a character,
while it isn't a newline
(end of password), */

while ((c=getchar()) != '\n')
{
// put it onto the back of the password
    password.push_back(c);
// output a '*' character
    putchar('*');
}

if(password != pwcheck)
cout<<"your password no good\n";
else
cout<<"password matched\n";


return 0;
}