摘要：
update point set point.boundry=b_point.p_index from point,b_point where point.point_x_y=b_point.point_x_y;select count(*) from point,b_point where po... 阅读全文
摘要：
#include int main(){ int i = 8; printf("%d\n",++i); printf("%d\n",--i); printf("%d\n",i++); printf("%d\n",i--); printf("%d\n",... 阅读全文
摘要：
#include int value =0; void printvalue() { printf("value = %d/n",value); };int main(){ int value = 0; value =1; printf... 阅读全文