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Aug 7th, 2003, 11:41 PM
#1
Thread Starter
Fanatic Member
C - 8 Queens Problem
Hi,
I saw a very cryptic code for 8 queens problem in the internet.
Place 8 queens in a chess board such that no other queen is in the same row, column and diagnol.
Code:
# include<stdio.h>
int v,i,j,k,l,s,a[99];
main()
{
for(s=8;*a-s;v=a[j*=v]-a[i],k=i<s,j+=(v=j<s&&(!k&&!!printf(2+"\n\n%c"-(!l<<!j)," #Q"[l^v?(l^j)&1:2])&&++l||a[i]<s&&v&&v-i+j&&v+i-j))&&!(l%=s),v||(i==j?a[i+=k]=0:++a[i])>=s*k&&++a[--i]);
printf("\n\n");
}
My Code
Code:
# include<stdio.h>
# define Q 8
struct POINT {int x,y;};
POINT q[Q];
int N;
bool chkAll(int x){
for ( int i =x ; i >=0 ; i--)
for(int j = i - 1; j >= 0 ; j--)
if(q[i].x == q[j].x || q[i].y == q[j].y ||
q[i].x + q[i].y == q[j].x + q[j].y ||
q[i].x - q[j].x == q[i].y - q[j].y)
return false; return true;
}
void MoveQueen(int x){
if(x >= Q)
{
printf("\n\nSolution : %d \n\n\t",++N);
for(int j=0;j<Q;printf("\n\t"),j++)
for(int i=0;i<Q;((q[j].x==j) && (q[j].y==i))?printf("Q%c",179) : printf("_%c",179),i++);
return;
}
for (int j = 0; j < Q ;q[x].x = x,j++){ q[x].y = j;
if(chkAll(x)) MoveQueen(x + 1);
}
}
void main(){for (int i = 0; i < Q; q[0].x = 0,q[0].y = i,MoveQueen(1),i++);}
Regards,
Pradeep
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Sep 16th, 2003, 12:36 PM
#2
Could you deobfuscate that stuff?
All the buzzt
CornedBee
"Writing specifications is like writing a novel. Writing code is like writing poetry."
- Anonymous, published by Raymond Chen
Don't PM me with your problems, I scan most of the forums daily. If you do PM me, I will not answer your question.
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Sep 16th, 2003, 11:32 PM
#3
Thread Starter
Fanatic Member
Hi Cornedbee
Hi,
The code which I found in the internet.. ??????... I have no clue what it does but when compiled runs like a charm...
The problem is place 8 queens on a chess board in such a way that no other queen falls in the same diagnoal and verticle and horizontal.
Check my games section in my website, I have made that game in VB, there is a cheat code also which will give you the list of solutuions...
Regards,
Pradeep
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Apr 30th, 2005, 08:51 AM
#4
Member
Re: C - 8 Queens Problem
The program works great!! Just one thing, can you put comments on your code. i am trying to learn how to program and it would really help me out.
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