静态变量定义后，在静态变量定义时赋值，那么以后这个定义时赋值语句再不成立，如果单独赋值那么语句会一直执行。

而全局变量定以后，在全局变量定义时赋值，那么以后这个定义时赋值语句一直成立，如果单独赋值那么语句会一直执行。-After the static variables defined in the static variable defined assignment, so do not set up after the assignment when this definition, if a single assignment, the statement would have been　d.

Global variables set later, when the global variable defined assignment, then later when the assignment has been set up to this definition, if a single assignment, the statement would have been　d.