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CC3200,为什么从有些初始化过的的全局变量在watch Expressions中看到的全是点呢?



官方例程中,在初始化char型全局变量数组g_cBsdBuf时,是用0到9循环赋值的,我运行了一下程序,观察watch Expressions中的g_cBsdBuf的元素值,发现全是符号".",我改成用a,b,c等字符初始化就能在watch Expressions中显示出来,怎么回事,难道只能发送字符么?为何没法定义byte类型的变量?如果想发送数字怎么办?