有以下程序:struc 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.num,b.num); }执行后的输出结果是( )。
A.2041 2044
B.2041 2043
C.2042 2044
D.2042 2043