main() { struct point { int x, y; } a; /*定义a为结构体point类型*/ int key, key1; a.x = 40; /*设置光标的初始位置*/ a.y = 10; clrscr(); gotoxy(a.x, a.y); /*光标定位在指定位置*/ printf("%c", 6); while (bioskey(1) == 0) { key = bioskey(0); /*将所按键盘...