Ascii value

This is a discussion on Ascii value within the C Programming forums, part of the General Programming Boards category; what is the ascii value for each of the 4 arrow keys?...

  1. #1
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    Ascii value

    what is the ascii value for each of the 4 arrow keys?

  2. #2
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    The arrow keys return two ascii values, first a NULL (ascii 0), and then one of the following:

    72 - up arrow
    80 - down arrow
    75 - left arrow
    77 - right arrow

    so first checked for ascii 0, and if you get that, check for a second code. Oh, and those values are in decimal, not hex.

  3. #3
    The superhaterodyne twomers's Avatar
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    Or if you want a tutorial on using the keys just go here

  4. #4
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    On my system they give 224 instead of 0!

    And I believe the only way to retrieve those codes is through getch(), which is painfully non-standard...
    Code:
    #include <stdio.h>
    
    void J(char*a){int f,i=0,c='1';for(;a[i]!='0';++i)if(i==81){
    puts(a);return;}for(;c<='9';++c){for(f=0;f<9;++f)if(a[i-i%27+i%9
    /3*3+f/3*9+f%3]==c||a[i%9+f*9]==c||a[i-i%9+f]==c)goto e;a[i]=c;J(a);a[i]
    ='0';e:;}}int main(int c,char**v){int t=0;if(c>1){for(;v[1][
    t];++t);if(t==81){J(v[1]);return 0;}}puts("sudoku [0-9]{81}");return 1;}

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