Linux终端下的字符回显问题

利用tcgetattr()和tcsetattr()函数

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

int main()
{
        char input[20];
        struct termios oldsetting,newsetting;
        tcgetattr(fileno(stdin), &oldsetting);
        newsetting = oldsetting;
        newsetting.c_lflag &= ~ECHO;
        tcsetattr(fileno(stdin), TCSANOW, &newsetting);
        gets(input);
        tcsetattr(fileno(stdin), TCSANOW, &oldsetting);
        printf("%s\n",input);

        return 0;
}