8*8的棋盘的二进制表示法

#include<stdio.h>#include<math.h>/*8*8的棋盘,用8未表示,前四位表示列,后四位表示行*/unsigned char binary_row = 0x07; /*求与后只有行*/unsigned char binary_col = 0x70; /*求与后只有列*/bool isSameRow(unsigned char a, unsigned char b){a = a & binary_row;b = b & binary_row;if( a == b)return true;return false;}bool isSameCol(unsigned char a, unsigned char b){a = a & binary_col;b = b & binary_col;if(a == b)return true;return false;}bool IsDiagonal(unsigned char a, unsigned char b){/*右移a b求列的差  行的差可直接求与*/if(abs( (a>>4) - (b>>4) ) == abs( (a&binary_row) - (b&binary_row) ))return true;return false;}void test(){unsigned char apos = 0x40;unsigned char bpos = 0x11;unsigned char cpos = 0x22;unsigned char dpos = 0x14;unsigned char epos = 0x54;if(isSameCol(bpos, dpos))printf("b and d in the same col\n");if(isSameRow(dpos, epos))printf("d and e in the same row\n");if(IsDiagonal(apos, cpos))printf("a and c on the diagonal\n");}int main(){test();return 0;}