随笔分类 -  Linux C

linux系统函数及简单编程
一种宏
摘要：cc2541的代码中#define st(x) do { x } while (__LINE__ == -1)#define WD_KICK() st( WDCTL = (0xA0 | WDCTL & 0x0F); WDCTL = (0x50 | WDCTL & 0x0F); )1、__LINE... 阅读全文

posted @ 2014-12-16 16:12 vi_cc 阅读(216) 评论(0) 推荐(0)

char型变量理解
摘要：char c = 128;printf("%d", c);问输出是多少？正确答案应该是-128。如下几种情况：char c=128;printf("%u\n", c); //按%u输出，结果为 4294967168printf("%d\n", c); //按%d输出，结果为 -128printf("... 阅读全文

posted @ 2014-11-18 14:58 vi_cc 阅读(2637) 评论(0) 推荐(0)

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