在linux中，使用getch()很麻烦，以下是我搜集到的密码输入回显星号的代码，亲测好用！
#include<stdio.h>
#include<termios.h>
#include<unistd.h>
#include<assert.h>
#include<string.h>
#include <stdlib.h>
int getch()
{
int c=0;
struct termios org_opts, new_opts;
int res=0;
//----- store old settings -----------
res=tcgetattr(STDIN_FILENO, &org_opts);
assert(res==0);
//---- set new terminal parms --------
memcpy(&new_opts, &org_opts, sizeof(new_opts));
new_opts.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL | ECHOPRT | ECHOKE | ICRNL);
tcsetattr(STDIN_FILENO, TCSANOW, &new_opts);
c=getchar();
//------ restore old settings ---------
res=tcsetattr(STDIN_FILENO, TCSANOW, &org_opts);
assert(res==0);
return c;
}
int main()
{
int i;
char *pd = (char *)malloc(sizeof(char) * 128);
for(i = 0; ; i++)
{
pd[i] = getch();
if(pd[i] == '\n')
{
pd[i] = '\0';
break;
}
if(pd[i] == 127) //删除
{
printf("\b \b");
i = i - 2;
}
else
{
printf("*");
}
if(i<0)
{
pd[0]='\0';
}
}
printf("\ncode:%s\n",pd);
return 0;
}
