Enable Numpad in PuTTY

Change settings -> Terminal -> Features -> Disable application keypad mode

see the picture below:

Fonts For Programming

Download Directory

[C]方向鍵輸入判斷

#include <stdio.h>
#include <conio.h>

int main()
{
    char ch1, ch2;
    while(ch1 = getch())
    {
        if(ch1 == -32)
{
            ch2 = getch();
         
            if(ch2 == 72)
                printf("up key press\n");
            if(ch2 == 75)
                printf("left key press\n");
            if(ch2 == 77)
                printf("right key press\n");
            if(ch2 == 80)
                printf("down key press\n");
    }
    }
    return 0;
}

[Arduino] Arduino Leonardo

Source: http://www.pighixxx.com/downloads/arduino-leonardo-v2/