Keil报错： C275: expression with possibly no effect和error C141: syntax error near '='
照着案例抄开发板的程序，rebuild时报错，提示：main.c(20): warning C275: expression with possibly no effectmain.c(20): error C141: syntax error near '='很奇怪，提示“duan = 0x7c”这句有误，就一个最简单的赋值为什么不对？百思不得其解。#include<reg...
