OpenCores
URL https://opencores.org/ocsvn/eco32/eco32/trunk

Subversion Repositories eco32

[/] [eco32/] [trunk/] [lcc/] [tst/] [8q.c] - Blame information for rev 157

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 4 hellwig 
int up[15], down[15], rows[8], x[8];
2 
int queens(), print();
3 
 
4 
main()
5 
{
6 
        int i;
7 
 
8 
        for (i = 0; i < 15; i++)
9 
                up[i] = down[i] = 1;
10 
        for (i = 0; i < 8; i++)
11 
                rows[i] = 1;
12 
        queens(0);
13 
        return 0;
14 
}
15 
 
16 
queens(c)
17 
{
18 
        int r;
19 
 
20 
        for (r = 0; r < 8; r++)
21 
                if (rows[r] && up[r-c+7] && down[r+c]) {
22 
                        rows[r] = up[r-c+7] = down[r+c] = 0;
23 
                        x[c] = r;
24 
                        if (c == 7)
25 
                                print();
26 
                        else
27 
                                queens(c + 1);
28 
                        rows[r] = up[r-c+7] = down[r+c] = 1;
29 
                }
30 
}
31 
 
32 
print()
33 
{
34 
        int k;
35 
 
36 
        for (k = 0; k < 8; k++)
37 
                printf("%c ", x[k]+'1');
38 
        printf("\n");
39 
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.