跟别人问重复了，你们难道是一个老师教的啊？ 网上很多类似的，你参考下：#include#includestruct student { char name[30]; float math; float chinese; float english; float average; }; int MenuChoice(void); int EnterAccount(void); void Enter(struct student *fst); void Amend(struct student *src); void Delete(struct student *next); void Print(struct student *out); main() { struct student one[100] = , *look = one; int menu, t; while ((menu = MenuChoice()) != 0) if (menu >= 1 & menuname, ＂＂)) printf（＂学号：%d\n姓名： %s\n语文成绩： %.1f\n数学成绩：%.1f\n英语成绩： %f\n平均＂成绩：%.1f\n＂, t, look->name, look->chinese, look->math, look->english, look->average）; else printf（＂对不起，该学号不存在！\n＂）; break; case 3: Amend(look); break; case 4: Delete(look); break; } } else if (menu == 5) Print(one); else printf（＂错误的请求！\n＂）; return 0; } int MenuChoice(void) { int choice; printf（＂请选择：\n＂ ＂1 - 新建学生信息\n＂ ＂2 - 查找学生信息\n＂ ＂3 - 修改学生信息\n＂ ＂4 - 删除学生信息\n＂ ＂5 - 打印学生信息\n＂ ＂0 - 退出\n＂）; scanf(＂%d＂, &choice); return choice; } int EnterAccount(void) { int ret; printf（＂请输入学号：\n＂）; scanf(＂%d＂, &ret); if (ret >= 1 & retname, &fst->chinese, &fst->math, &fst->english, &fst->average); } void Amend(struct student *src) { int t; printf（＂请选择：\n＂ ＂1 - 修改学生姓名\n＂ ＂2 - 修改学生语文成绩\n＂ ＂3 - 修改学生数学成绩\n＂ ＂4 - 修改学生英语成绩\n＂ ＂5 - 修改学生平均成绩\n＂）; scanf(＂%d＂, &t); switch (t) { case 1: printf（＂请输入学生的新名字\n＂）; scanf(＂%s＂, src->name); break; case 2: printf（＂请输入学生新的语文成绩\n＂）; scanf(＂%f＂, &src->chinese); break; case 3: printf（＂请输入学生新的数学成绩\n＂）; scanf(＂%f＂, &src->math); break; case 4: printf（＂请输入学生新的英语成绩\n＂）; scanf(＂%f＂, &src->english); break; case 5: printf（＂请输入学生新的平均成绩\n＂）; scanf(＂%f＂, &src->average); break; } } void Delete(struct student *next) { strcpy(next->name, ＂＂); next->math = next->english = next->chinese = next->average = 0.0; } void Print(struct student *out) { struct student *up; for (up = out; outname, ＂＂)) printf（＂学号：%d\n姓名： %s\n语文成绩： %.1f\n数学成绩：%.1f\n英语成绩： %.1f\n平均成绩：%.1f\n＂, out-up + 1, out->name, out->chinese, out->math, out->english, out->average）; }