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[/] [eco32/] [trunk/] [lcc/] [tst/] [8q.c] - Blame information for rev 254

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Line No. Rev Author Line
1 4 hellwig 
int up[15], down[15], rows[8], x[8];
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int queens(), print();
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main()
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{
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        int i;
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        for (i = 0; i < 15; i++)
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                up[i] = down[i] = 1;
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        for (i = 0; i < 8; i++)
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                rows[i] = 1;
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        queens(0);
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        return 0;
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}
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queens(c)
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{
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        int r;
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        for (r = 0; r < 8; r++)
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                if (rows[r] && up[r-c+7] && down[r+c]) {
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                        rows[r] = up[r-c+7] = down[r+c] = 0;
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                        x[c] = r;
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                        if (c == 7)
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                                print();
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                        else
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                                queens(c + 1);
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                        rows[r] = up[r-c+7] = down[r+c] = 1;
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                }
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}
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print()
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{
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        int k;
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        for (k = 0; k < 8; k++)
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                printf("%c ", x[k]+'1');
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        printf("\n");
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}

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