求助！c语言里面键盘上的上下左右键有对应的ASCII码值吗？

[gao_steven]

如题，如果要从键盘输入获取到是否输入了上下左右键，如何实现呢？

[夏梦c]

while (1)
	{
		int ch = getch();
		printf("%d\n", ch);
		if (ch == 13)
		{
			break;
		}
	}

[漫步者、]

有的，你去查一下ASCII表

[starytx]

    for (int i = 24; i != 28 ;i++)
    {
        printf("%d [%c]\n" ,i ,i);
    }

输出结果： 24 [↑] 25 [↓] 26 [→] 27 [←]

[gao_steven]

getch()函数需要conio.h头文件啊，在linux环境下没有这个头文件，无法使用这个函数啊，这怎么解决？

[赵4老师]

#include <conio.h>
#include <windows.h>

void ConPrintAt(int x, int y, char *CharBuffer, int len)
{
   DWORD count;
   COORD coord = {x, y};
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
   SetConsoleCursorPosition(hStdOut, coord);
   WriteConsole(hStdOut, CharBuffer, len, &count, NULL);
}
void HideTheCursor()
{
   CONSOLE_CURSOR_INFO cciCursor;
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);

   if(GetConsoleCursorInfo(hStdOut, &cciCursor))
   {
      cciCursor.bVisible = FALSE;
      SetConsoleCursorInfo(hStdOut, &cciCursor);
   }
}

void ShowTheCursor()
{
   CONSOLE_CURSOR_INFO cciCursor;
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);

   if(GetConsoleCursorInfo(hStdOut, &cciCursor))
   {
      cciCursor.bVisible = TRUE;
      SetConsoleCursorInfo(hStdOut, &cciCursor);
   }
}
void GetWH(int *w,int *h) {
    HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    if (GetConsoleScreenBufferInfo(hStdOut, &csbi)) {
        *w=csbi.srWindow.Right;
        *h=csbi.srWindow.Bottom;
    } else {
        *w=80;
        *h=25;
    }
}
void ClearConsole()
{
   //Get the handle to the current output buffer...
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
   //This is used to reset the carat/cursor to the top left.
   COORD coord = {0, 0};
   //A return value... indicating how many chars were written
   //   not used but we need to capture this since it will be
   //   written anyway (passing NULL causes an access violation).
   DWORD count;
   //This is a structure containing all of the console info
   // it is used here to find the size of the console.
   CONSOLE_SCREEN_BUFFER_INFO csbi;
   //Here we will set the current color
   if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
   {
      //This fills the buffer with a given character (in this case 32=space).
      FillConsoleOutputCharacter(hStdOut, (TCHAR) 32, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
      FillConsoleOutputAttribute(hStdOut, csbi.wAttributes, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
      //This will set our cursor position for the next print statement.
      SetConsoleCursorPosition(hStdOut, coord);
   }
}

//This will set the position of the cursor
int main() {
    unsigned short k;
    int x,y,w,h;

	SetConsoleOutputCP(437);
    ClearConsole();
    GetWH(&w,&h);
    x=w/2;y=h/2;
    HideTheCursor();
    ConPrintAt(x,y,"\xdb",1);
    while (1) {
        Sleep(50);
        k=getch();
        if (27==k) break;//按Esc键退出
        if (0==k||0xe0==k) k|=getch()<<8;//非字符键
        switch (k) {
            case 0x48e0:case 0x04800://上
                if (y>0) {
                    ConPrintAt(x,y," ",1);
                    y--;
                    ConPrintAt(x,y,"\xdb",1);
                }
            break;
            case 0x50e0:case 0x05000://下
                if (y<h) {
                    ConPrintAt(x,y," ",1);
                    y++;
                    ConPrintAt(x,y,"\xdb",1);
                }
            break;
            case 0x4be0:case 0x04b00://左
                if (x>0) {
                    ConPrintAt(x,y," ",1);
                    x--;
                    ConPrintAt(x,y,"\xdb",1);
                }
            break;
            case 0x4de0:case 0x04d00://右
                if (x<w-1) {
                    ConPrintAt(x,y," ",1);
                    x++;
                    ConPrintAt(x,y,"\xdb",1);
                }
            break;
        }
//      cprintf("%04x pressed.\r\n",k);

    }
    ClearConsole();
    ShowTheCursor();
    return 0;
}

[hanqingwu]

来源于百度.... linux 平台 #include <stdio.h> #include <curses.h> int main(void) { char ch; initscr(); printw("Input a character:");[1] ch = getch(); printw("\nYou input a '%c'\n", ch);[1] endwin(); return 0; }

[hanqingwu]

linux平台是　#include <curses.h>这个