Hide password input on terminal

Question

I want to mask my password while writing it with *. I use Linux GCC for this code. I know one solution is to use getch() function like this

Answer 1

Here is my idea, adapted from that of the C++ official site.

#include 
#include 
#include 
#include 
#include 
using namespace std;
string getpass(const char *prompt, bool showchar = false, char echochar = '*')
{
    struct termios oi, ni;
    tcgetattr(STDIN_FILENO, &oi);
    ni = oi;
    ni.c_lflag &= ~(ICANON | ECHO);
    const char DELETE = 127;
    const char RETURN = 10;
    string password;
    unsigned char ch = 0;
    cout << prompt;
    tcsetattr(STDIN_FILENO, TCSANOW, &ni);
    while (getchar() != RETURN) {
        if (ch == DELETE) {
            if(password.length != 0){
                if (showchar) cout << "\b \b";
                password.resize(password.length() - 1);
            }
        }else {
            password += getchar();
            if (showchar) cout << echochar;
        }
    }
    tcsetattr(STDIN_FILENO,TCSANOW,&oi)
    cout << endl;
    return password;
}

It will read one character at once and add it to the string and supports showing another character.