switch(word)
{ case1：{LED_GREEN(ON);LED_RED(OFF);
DELAY_S(10);LED_GREEN(OFF);LED_RED(OFF);} break；
case2：{LED_GREEN(OFF);LED_RED(ON);
while(KEY);LED_GREEN(OFF);LED_RED(OFF);} break；
default: { ；}戀爀攀愀欀；
}
你說的一種直接表達，LED_GREEN()、LED_GREEN()函數和按鍵防抖等未完善。