有以下程序 #include 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; } int main(void) { struct STU a={"YangSan",2041},b={"WangYin",2043}; f1(a); f2(&b); printf("%d %d",a.num,b.num); return 0; }