在linux下 用gcc 编译：
以下是各个功能键的ascii码值：
Tab：          9
ENTER：        13
Space：        32
Home：         27    91    49    126
Delete：       27    91    51    126
End：          27    91    52    126
PageUp：       27    91    53    126
PageDown：     27    91    54    126
F01：          27    91    91    65
F02：          27    91    91    66
F03：          27    91    91    67
F04：          27    91    91    68
F05：          27    91    91    69
F06：          27    91    49    55    126
F07：          27    91    49    56    126
F08：          27    91    49    57    126
F09：          27    91    50    48    126
F10：          27    91    50    49    126
F11：          27    91    50    51    126
F12：          27    91    50    52    126
向上：         27    91    65
向下：         27    91    66
向右：         27    91    67
向左：         27    91    68

代码如下：
#include <stdio.h>
#include <termios.h>
#include <unistd.h>

//实现windows下getch()的功能
int getch(void)
{
    int ret;
    struct termios term,term_old;
   
    if(tcgetattr(STDIN_FILENO,&term)==-1)
    {
        printf("Error!");
        return 0;
    }   
    term_old=term;
    cfmakeraw(&term);
    tcsetattr(STDIN_FILENO,TCSANOW,&term);
    ret=fgetc(stdin);
    tcsetattr(STDIN_FILENO,TCSANOW,&term_old);
    return ret;
}

//对键盘按下的键做判断（不完全）
int Press_Judge(void)
{
    int ch;
        ch=getch();
        switch(ch)
        {
        case 9:
            printf("Tab\n");
            return ch;
        case 13:
            printf("Enter\n");
            return ch;
        case 32:
            printf("Space\n");
            return ch;
        case 27:
            break;
        default:
            printf("[%c]",ch);
            return ch;
        }

        ch=getch();    //第二层的都是91

        ch=getch();
        switch(ch)
        {
        case 51:
            printf("Delete\n");
            return ch;
        case 52:
            printf("End\n");
            return ch;
        case 53:
            printf("PageUp\n");
            return ch;
        case 54:
            printf("PageDown\n");
            return ch;
        case 65:
            printf("Up\n");
            return ch;
        case 66:
            printf("Down\n");
            return ch;
        case 67:
            printf("Right\n");
            return ch;
        case 68:
            printf("Left\n");
            return ch;
        default:
            break;
        }

        ch=getch();
        switch(ch)
        {
        case 48:
            printf("F9\n");
            return ch;
        case 49:
            printf("F10\n");
            return ch;
        case 51:
            printf("F11\n");
            return ch;
        case 52:
            printf("F12\n");
            return ch;
        case 55:
            printf("F6\n");
            return ch;
        case 56:
            printf("F7\n");
            return ch;
        case 57:
            printf("F8\n");
            return ch;
        case 65:
            printf("F1\n");
            return ch;
        case 66:
            printf("F2\n");
            return ch;
        case 67:
            printf("F3\n");
            return ch;
        case 68:
            printf("F4\n");
            return ch;
        case 69:
            printf("F5\n");
            return ch;
        case 126:
            printf("Home\n");
            return ch;
        default:
            printf("Unknow!!!\n");
            return ch;
        }
    return 0;
}


int main(int argc, char *argv[])
{
    int ch;
    printf("Input (\"Home\" over):\n");
   
    while(ch!=126)
    {
        ch=Press_Judge();
        printf("%d\n",ch);     //测试用  查看最后传出的码值
        setbuf(stdin,NULL);   //就是这里  清空输入缓冲区无效
    }
   
    //getch();
    return 0;
}

求解...

神啊~  你们在哪里~~

清空缓冲区？用fflush试试？