!!LICENCE!! own, freely distributeable for non-profit. read CPYRIGHT.LCC
*/
+#include <stdio.h>
+
int up[15], down[15], rows[8], x[8];
void queens(int c);
void print(void);
int main(void)
{
- int i;
- for (i = 0; i < 15; i++)
- up[i] = down[i] = 1;
- for (i = 0; i < 8; i++)
- rows[i] = 1;
- queens(0);
- return 0;
+ int i;
+ for (i = 0; i < 15; i++)
+ up[i] = down[i] = 1;
+ for (i = 0; i < 8; i++)
+ rows[i] = 1;
+ queens(0);
+ return 0;
}
void queens(int c)
{
- int r;
+ int r;
- for (r = 0; r < 8; r++)
- if (rows[r] && up[r-c+7] && down[r+c]) {
- rows[r] = up[r-c+7] = down[r+c] = 0;
- x[c] = r;
- if (c == 7)
- print();
- else
- queens(c + 1);
- rows[r] = up[r-c+7] = down[r+c] = 1;
- }
+ for (r = 0; r < 8; r++)
+ if (rows[r] && up[r-c+7] && down[r+c]) {
+ rows[r] = up[r-c+7] = down[r+c] = 0;
+ x[c] = r;
+ if (c == 7)
+ print();
+ else
+ queens(c + 1);
+ rows[r] = up[r-c+7] = down[r+c] = 1;
+ }
}
void print(void)
{
- int k;
+ int k;
- for (k = 0; k < 8; k++) {
- printf("%c", x[k]+'1');
- if(k<7) printf(" ");
- }
- printf("\n");
+ for (k = 0; k < 8; k++) {
+ printf("%c", x[k]+'1');
+ if(k<7) printf(" ");
+ }
+ printf("\n");
}