Thread: Help With Creating Co - ordinates Program

  1. #1
    Registered User
    Join Date
    Jun 2006

    Help With Creating Co - ordinates Program

    hey im new to this forum and also unfortunately new to c programming lol!
    i have only just started becoming use to using C Programming
    my question is:
    im designing a very simple (read: VERY Simple) C program which can take in the co-ordinates of any set of numbers similar to those found on a cartesian graph
    these co-ordinates (normally a set in the form of (x,y) &(a,b))are entered via the user but the program then needs to distinguish the difference between both X and A and then Y and B
    would guys have any tips out there on how to go about creating a program as such?
    it wood be such a great help!

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Well, you could start with a program which reads some input from the user, performs some kind of conversion, and prints the converted result back to the user.

    Then work on the next step of your assignment.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3
    Registered User
    Join Date
    Mar 2006
    Have the user enter coordinates in pairs, and always handle coordinates in pairs, (x, y) style. That way, you'll never lose track. You could also create a struct (if you've learned that already) to store a coordinate pair, if you feel up to it.
    #include <stdio.h>
    void J(char*a){int f,i=0,c='1';for(;a[i]!='0';++i)if(i==81){
    /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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