【单选题】
struct student{long int num;char name[20];char sex;char addr[20];}______。以下能够正确定义的是
①
a={Li Lin,10101,M,123 Beijing Road
②
a={10101,Li Lin,123 Beijing Road,M
③
a={10101,Li Lin,M,123 Beijing Road
④
a={123 Beijing Road,Li Lin,M,10101};