如何有呼应与使用星号残培密码（） [英] How to have password echoed as asterisks using getch()

问题描述

我试图使从用户输入的密码和存储密码由用户输入的字符串，但在显示应包含星号，采用的getch（）功能的程序。我被这个迷惑。如果有人可以帮助？

I was trying to make a program that inputs a password from a user and stores the password as the string entered by the user but the display should contain asterisks, using getch() function. i am bamboozled by this. If anyone could help?

推荐答案

假设你在Windows上运行，你的编码是ASCII结果
试试这个：

Assuming you are running on windows and your encoding is ASCII
Try this:

#include <stdio.h>
#include <string.h>
#include <conio.h>
int main()
{
    char buffer[256] = {0};
    char password[] = "password";
    char c;
    int pos = 0;

    printf("%s", "Enter password: ");
    do {
        c = getch();

        if( isprint(c) ) 
        {
            buffer[ pos++ ] = c;
            printf("%c", '*');
        }
        else if( c == 8 && pos )
        {
            buffer[ pos-- ] = '\0';
            printf("%s", "\b \b");
        }
    } while( c != 13 );

    if( !strcmp(buffer, password) )
        printf("\n%s\n", "Logged on succesfully!");
    else
        printf("\n%s\n", "Incorrect login!");
    return 0;
}

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