单项选择题

有以下程序:
struct STU
char name[10];
int num;

void f1(struct STU c)
struct STU b="LiSiGuo",2042);
c=b;
void f2(struct STU *c)
struct STU b="SunDan",2044);
*c=b;
main()
struct STU a="YangSan",2041,b="WangYin",2043);
f1(

A.;f2(&
B.;
printf("%d %d\n",a.nu