为什么使用typedef修改数据类型名称的时候报错

#define _CRT_SECURE_NO_DEPRECATE

#include

#include

void main() {

struct  Member {
    char  ID[7];
    char   name[10];

    char  sex;
    int   age;

    int  points;


};

typedef   Member   ok;

ok  mem;
printf("Input  member  ID:");

scanf("%s", mem.ID);

printf("Input  member  name:");

scanf("%s", mem.name);

getchar();

printf("Input  member  sex:");

scanf("%c", &mem.sex);

getchar();

printf("Input  member  age:");

scanf("%d", &mem.age);

getchar();

printf("Input  member  points:");

scanf("%d", &mem.points);

printf("ID        Name         Sex      Age     Points   \n");

printf("%s        %s           %c       %d      %d      ", mem.ID, mem.name,mem.sex, mem.age, mem.points);

system("pause");

}

typedef struct mem ok