嘿嘿，大一的时候做的课设，是关于学生信息管理系统的，这个做得比较全，用c写的，可以升序，降序，文件的保存以及，学生信息的录入等等等等，放这儿仅供参考，有什么不对的地方，欢迎批评指出，哈哈！
#include <stdio.h> #include <stdlib.h> #include <string.h> #define YES 1 #define NO 0 typedef struct { int num; float math_score; float engl_score; float chin_score; float phy_score; float chem_score; double aver_score; double sum_score; char sex; }StudentDate;//学生基本信息 typedef struct student { char name[20];//学生姓名 StudentDate one;//学生其他信息 int rank;//成绩排名 struct student *next; }Student, *List; Student *createListHead(void);//创建链表的头 void menu(void);//主菜单 void sortList(Student *pHead);//排序链表 void readListWithFile(Student *pHead, char *file_name);//从文件中读取数据，并保存在链表中 int userChioce(Student *pHead);//用户选择 int sortMenu(void);//打印选择菜单 void addStudentInfo(Student *pHead);//向链表的末尾添加数据 int scanMenu(void);//浏览菜单 void findStudentInfo(Student *pHead);//查找学生信息 void delStudentInfo(Student *pHead);//删除某一个学生信息 void alterStudentInfo(Student *pHead);//修改学生信息 void saveList(Student *pHead);//将链表保存在文件里 void printList(Student *pHead);//打印链表 void statisStudentInfo(Student *pHead);//查看学生信息 int statisMenu(void);//查看菜单 void inputData(Student *pHead,Student *node);//输入信息 int adMenu(void); int main(void) { Student *pHead; pHead = createListHead();//读取信息 while (1) { if (9 == userChioce(pHead)) //按9时退出系统 { break; } } return 0; } void menu(void) { system("CLS");//清屏 printf("\n\n\n\t\t\t\t┌─────────────────┐\n"); printf("\t\t\t\t│ 学生成绩统计系统 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 1 增加学生信息 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 2 删除学生信息 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 3 修改学生信息 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 4 查找学生信息 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 5 查看学生成绩 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 6 排序学生成绩 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 9 退出系统 │\n"); printf("\t\t\t\t├─────────────────┤\n"); printf("\t\t\t\t│ 制作人：xxxxxxxxxx \n"); printf("\t\t\t\t└─────────────────┘\n"); } Student *createListHead(void) { Student *pHead; pHead = (List)malloc(sizeof(Student)); pHead->next = NULL; return pHead; } void readListWithFile(Student *pHead, char *file_name) { FILE *fp; Student *p1, *p2; int count, rank = 0; StudentDate txt; char stu_name[20]; fp = fopen(file_name, "r"); if (fp == NULL) { fp = fopen(file_name, "w"); fclose(fp); return; } fseek(fp, 0L, 2); count = ftell(fp); p1 = pHead; fp = fopen(file_name, "r"); while (!feof(fp)) { p2 = (List)malloc(sizeof(Student)); fscanf(fp, "%d%s %c%f%f%f%f%f\n", &p2->one.num, p2->name, &p2->one.sex, &p2->one.chin_score, &p2->one.math_score, &p2->one.engl_score, &p2->one.chem_score, &p2->one.phy_score); p2->one.sum_score = (double)(p2->one.chin_score + p2->one.chin_score + p2->one.engl_score + p2->one.chem_score + p2->one.phy_score); p2->one.aver_score = p2->one.sum_score / 5; p2->next = NULL; p1->next = p2; p1 = p2; if (ftell(fp) == count) { break; } } //将链表排序，并初始化排名 for (p1 = pHead->next; p1 != NULL; p1 = p1->next) { for (p2 = p1->next; p2 != NULL; p2 = p2->next) { if (p2->one.sum_score > p1->one.sum_score) { txt = p2->one; strcpy(stu_name, p2->name); p2->one = p1->one; strcpy(p2->name, p1->name); p1->one = txt; strcpy(p1->name, stu_name); } } p1->rank = ++rank; } fclose(fp); } void sortList(Student *pHead) { Student *p1, *p2; StudentDate txt; char stu_name[20]; int bum, count = 0, rank; system("title 学生成绩统计系统-排序");//将标题栏命名为“学生成绩统计系统” bum = sortMenu(); if (bum == 1) //按成绩升序 { for (p1 = pHead->next; p1 != NULL; p1 = p1->next) { for (p2 = p1->next; p2 != NULL; p2 = p2->next) { if (p2->one.sum_score < p1->one.sum_score) { txt = p2->one; rank = p2->rank; strcpy(stu_name, p2->name); p2->one = p1->one; p2->rank = p1->rank; strcpy(p2->name, p1->name); p1->one = txt; p1->rank = rank; strcpy(p1->name, stu_name); } } } } else if (bum == 2)//按学号升序 { for (p1 = pHead->next; p1 != NULL; p1 = p1->next) { for (p2 = p1->next; p2 != NULL; p2 = p2->next) { if (p2->one.num < p1->one.num) { txt = p2->one; rank = p2->rank; strcpy(stu_name, p2->name); p2->one = p1->one; p2->rank = p1->rank; strcpy(p2->name, p1->name); p1->one = txt; p1->rank = rank; strcpy(p1->name, stu_name); } } } } else if (bum == 3) //按成绩降序 { for (p1 = pHead->next; p1 != NULL; p1 = p1->next) { for (p2 = p1->next; p2 != NULL; p2 = p2->next) { if (p2->one.sum_score > p1->one.sum_score) { txt = p2->one; rank = p2->rank; strcpy(stu_name, p2->name); p2->one = p1->one; p2->rank = p1->rank; strcpy(p2->name, p1->name); p1->one = txt; p1->rank = rank; strcpy(p1->name, stu_name); } } } } else if (bum == 4)//按学号降序 { for (p1 = pHead->next; p1 != NULL; p1 = p1->next) { for (p2 = p1->next; p2 != NULL; p2 = p2->next) { if (p2->one.num > p1->one.num) { txt = p2->one; rank = p2->rank; strcpy(stu_name, p2->name); p2->one = p1->one; p2->rank = p1->rank; strcpy(p2->name, p1->name); p1->one = txt; p1->rank = rank; strcpy(p1->name, stu_name); } } } } else if(bum==5) return; else { printf("\n输入错误，请重新输入；"); bum = sortMenu(); } printList(pHead); printf("敲任意数回到主菜单"); getch(); } void printList(Student *pHead) { pHead = pHead->next; system("CLS"); printf("\n\n ┏━━━┳━━━━┳━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━┓"); printf("\n ┃ 学号 ┃ 姓 名 ┃性别┃语 文┃高 数┃英 语┃C 语言┃大 物┃平均分┃总 分┃名次┃\n"); while (pHead) { printf(" ┣━━━╋━━━━╋━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━┫\n"); printf(" ┃ %-5d┃ %-6s ┃ %c ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃ %-3d┃\n", pHead->one.num, pHead->name, pHead->one.sex, pHead->one.chin_score, pHead->one.math_score, pHead->one.engl_score, pHead->one.chem_score , pHead->one.phy_score, pHead->one.aver_score, pHead->one.sum_score, pHead->rank); pHead = pHead->next; } printf(" ┗━━━┻━━━━┻━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━┛\n"); getch(); } int userChioce(Student *pHead) { int bum; system("title 学生成绩统计系统-主菜单");//将标题栏命名为“学生成绩统计系统” menu(); printf("请按键选择: "); bum = (int)(getch() - '0'); switch (bum) { case 1: addStudentInfo(pHead); break; case 2: delStudentInfo(pHead); break; case 3: alterStudentInfo(pHead); break; case 4: findStudentInfo(pHead); break; case 5: statisStudentInfo(pHead); break; case 9: break; case 6: sortList(pHead); break; default: break; } return bum; } int sortMenu(void) { int bum; system("CLS"); printf("\n\n\n"); printf("\t\t┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓\n"); printf("\t\t┃ 以什么方式排序 ？ ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 1 按成绩升序 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 2 按学号升序 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 3 按成绩降序 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 4 按学号降序 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 5 返回主菜单 ┃\n"); printf("\t\t┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛\n"); printf("请按键选择："); bum = (int)(getch() - '0'); system("CLS"); return bum; } void addStudentInfo(Student *pHead) { FILE *fp; Student *p1, *p2, *p3 = pHead; StudentDate txt; int judge = YES, rank = 0; char bum, stu_name[20]; system("title 学生成绩统计系统-添加");//将标题栏命名为“学生成绩统计系统” fp = fopen("stud.txt", "a"); while (pHead->next) { pHead = pHead->next; } while (judge) { p1 = (List)malloc(sizeof(Student)); inputData(p3,p1); p1->next = NULL; pHead->next = p1; pHead = p1; fprintf(fp, "%d %s %c %.1f %.1f %.1f %.1f %.1f\n", p1->one.num, p1->name, p1->one.sex, p1->one.chin_score, p1->one.math_score, p1->one.engl_score, p1->one.chem_score, p1->one.phy_score); printf("是否继续添加？(Y/N)"); bum = getch(); if (bum == 'n' || bum == 'N') { break; } } //并交换排名 for (p1 = p3->next; p1 != NULL; p1 = p1->next) { for (p2 = p1->next; p2 != NULL; p2 = p2->next) { if (p2->one.aver_score > p1->one.aver_score) { txt = p2->one; strcpy(stu_name, p2->name); p2->one = p1->one; strcpy(p2->name, p1->name); p1->one = txt; strcpy(p1->name, stu_name); } } p1->rank = ++rank; } fclose(fp); printf("\n敲任意数回到主菜单"); getch(); } int scanMenu(void) { int bum; system("CLS"); printf("\n\n\n"); printf("\t\t┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓\n"); printf("\t\t┃ 以什么方式？ ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 1 按学生的学号 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 2 按学生的姓名 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 3 按学生的名次 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 4 返回主菜单 ┃\n"); printf("\t\t┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛\n"); printf("请按键选择："); bum = (int)(getch() - '0'); system("CLS"); return bum; } int adMenu(void) { int bum; system("CLS"); printf("\n\n\n"); printf("\t\t┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓\n"); printf("\t\t┃ 以什么方式？ ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 1 按学生的学号 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 2 按学生的姓名 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 3 返回主菜单 ┃\n"); printf("\t\t┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛\n"); printf("请按键选择："); bum = (int)(getch() - '0'); system("CLS"); return bum; } void findStudentInfo(Student *pHead) { int bum, count = 0; int num; char student_name[20]; int student_rank; pHead = pHead->next; system("title 学生成绩统计系统-查找");//将标题栏命名为“学生成绩统计系统” bum = scanMenu(); if (bum == 1) { printf("请输入学生的学号："); scanf("%d", &num); while (pHead) { if (pHead->one.num == num) { if (count == 0) { printf("\n\t\t\t已经查到！\n"); printf("\n\n\n\n ┏━━━┳━━━━┳━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━┓"); printf("\n ┃ 学号 ┃ 姓 名 ┃性别┃语 文┃高 数┃英 语┃C 语言┃大 物┃平均分┃总 分┃名次┃\n"); count = 1; } printf(" ┣━━━╋━━━━╋━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━┫\n"); printf(" ┃ %-5d┃ %-6s ┃ %c ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃ %-3d┃\n", pHead->one.num, pHead->name, pHead->one.sex, pHead->one.chin_score, pHead->one.math_score, pHead->one.engl_score, pHead->one.chem_score , pHead->one.phy_score, pHead->one.aver_score, pHead->one.sum_score, pHead->rank); break; } pHead = pHead->next; } if (pHead == NULL) { printf("\n\t\t\t没有该学生记录！\n"); } else { printf(" ┗━━━┻━━━━┻━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━┛\n"); } } if (bum == 2) { printf("请输入学生姓名："); scanf("%s", student_name); while (pHead) { if (strcmp(student_name, pHead->name) == 0) { if (count == 0) { printf("\n\t\t\t已经查到！\n"); printf("\n\n\n\n ┏━━━┳━━━━┳━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━┓"); printf("\n ┃ 学号 ┃ 姓 名 ┃性别┃语 文┃高 数┃英 语┃C 语言┃大 物┃平均分┃总 分┃名次┃\n"); count = 1; } printf(" ┣━━━╋━━━━╋━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━┫\n"); printf(" ┃ %-5d┃ %-6s ┃ %c ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃ %-3d┃\n", pHead->one.num, pHead->name, pHead->one.sex, pHead->one.chin_score, pHead->one.math_score, pHead->one.engl_score, pHead->one.chem_score , pHead->one.phy_score, pHead->one.aver_score, pHead->one.sum_score, pHead->rank); } pHead = pHead->next; } if (count == 0) { printf("\n\t\t\t没有该学生记录！"); } else { printf(" ┗━━━┻━━━━┻━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━┛\n"); } } if (bum == 3) { printf("请输入学生名次："); scanf("%d",&student_rank); while (pHead) { if (student_rank == pHead->rank) { if (count == 0) { printf("\n\t\t\t已经查到！\n"); printf("\n\n\n\n ┏━━━┳━━━━┳━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━━┳━━┓"); printf("\n ┃ 学号 ┃ 姓 名 ┃性别┃语 文┃高 数┃英 语┃C 语言┃大 物┃平均分┃总 分┃名次┃\n"); count = 1; } printf(" ┣━━━╋━━━━╋━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━┫\n"); printf(" ┃ %-5d┃ %-6s ┃ %c ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃ %-3d┃\n", pHead->one.num, pHead->name, pHead->one.sex, pHead->one.chin_score, pHead->one.math_score, pHead->one.engl_score, pHead->one.chem_score , pHead->one.phy_score, pHead->one.aver_score, pHead->one.sum_score, pHead->rank); } pHead = pHead->next; } if (count == 0) { printf("\n\t\t\t没有该学生记录！"); } else { printf(" ┗━━━┻━━━━┻━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━┛\n"); } } if (bum == 4) { return; } printf("\n敲任意数回到主菜单"); getch(); } void delStudentInfo(Student *pHead) { Student *p1, *p2 = pHead; int bum; int num; char student_name[20], c; system("title 学生成绩统计系统-删除");//将标题栏命名为“学生成绩统计系统” bum = adMenu(); if (bum == 1) { p1 = pHead->next; printf("\n\t\t\t请输入要删除学生的学号："); scanf("%d", &num); while (p1) { if (p1->one.num == num) { printf("\n\t\t\t删除成功，删除的学生学号为：%d", num); if (p1->next == NULL) { pHead->next = NULL; break; } else { pHead->next = p1->next; free(p1); p1 = pHead->next; } } else if(p1->one.num != num) { pHead = pHead->next; p1 = pHead->next; printf("\n\t\t\t没有该学生信息！"); } saveList(p2); } } else if (bum == 2) { p1 = pHead->next; printf("\n\t\t\t请输入要删除的学生姓名："); scanf("%s", student_name); while (p1) { if (strcmp(p1->name, student_name) == 0) { printf("\n\t\t\t删除成功，姓名为: %s", student_name); if (p1->next == NULL) { pHead->next = NULL; break; } else { pHead->next = p1->next; free(p1); p1 = pHead->next; } } else if(strcmp(p1->name, student_name) != 0) { pHead = pHead->next; p1 = pHead->next; printf("\n\t\t\t没有该学生信息！"); } saveList(p2); } } else if (bum == 3) { return; } printf("\n敲任意数回到主菜单"); getch(); } void saveList(Student *pHead) { FILE *fp; fp = fopen("stud.txt", "w+"); pHead = pHead->next; while (pHead) { fprintf(fp, "%d %s %c %.1f %.1f %.1f %.1f %.1f\n", pHead->one.num, pHead->name, pHead->one.sex, pHead->one.chin_score, pHead->one.math_score, pHead->one.engl_score, pHead->one.chem_score, pHead->one.phy_score); pHead = pHead->next; } fclose(fp); } void alterStudentInfo(Student *pHead) { int bum, count = 0, j = 0; int num; char student_name[20]; Student *p1 = pHead->next; system("title 学生成绩统计系统-修改");//将标题栏命名为“学生成绩统计系统” bum = adMenu(); if (bum == 1) { printf("\n\t\t\t请输入要修改学生的学号："); scanf("%d", &num); while (p1) { j++; if (p1->one.num == num) { inputData(pHead,p1); break; } p1 = p1->next; } if (p1 == NULL) { getch(); printf("没有该学生信息！"); } } else { if (bum == 2) { printf("\n\t\t\t请输入要修改学生的姓名："); scanf("%s", student_name); while (p1) { j++; if (strcmp(p1->name, student_name) == 0) { inputData(pHead,p1); count = 1; } p1 = p1->next; } if (count == 0) { printf("\n\t\t\t没有该学生信息！"); getch(); } } else { if (3 == bum) { return; } else { alterStudentInfo(pHead); } } } saveList(pHead); printf("\n敲任意数回到主菜单"); getch(); } void statisStudentInfo(Student *pHead) { double aver_score[5] = {0,0,0,0,0}; Student *p1 = pHead->next; int count = 0; int bum; system("title 学生成绩统计系统-查看");//将标题栏命名为“学生成绩统计系统” bum = statisMenu(); if (bum == 1) { while (p1) { aver_score[0] = aver_score[0] + p1->one.chin_score; aver_score[1] = aver_score[1] + p1->one.math_score; aver_score[2] = aver_score[2] + p1->one.engl_score; aver_score[3] = aver_score[3] + p1->one.chem_score; aver_score[4] = aver_score[4] + p1->one.phy_score; p1 = p1->next; count++; } aver_score[0] = aver_score[0] / count; aver_score[1] = aver_score[1] / count; aver_score[2] = aver_score[2] / count; aver_score[3] = aver_score[3] / count; aver_score[4] = aver_score[4] / count; p1 = pHead->next; printf("\n\n ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓\n"); printf(" ┃ 学号 ┃ 姓 名 ┃性别┃语 文┃高 数┃英 语┃C 语言┃大 物┃平均分┃总 分┃名次┃\n"); printf(" ┣━━━╋━━━━╋━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━━╋━━┫\n"); while (p1) { printf(" ┃ %-5d┃ %-6s ┃ %c ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃%5.1f ┃ %-3d┃\n", p1->one.num, p1->name, p1->one.sex, p1->one.chin_score, p1->one.math_score, p1->one.engl_score, p1->one.chem_score , p1->one.phy_score, p1->one.aver_score, p1->one.sum_score, p1->rank); p1 = p1->next; } printf(" ┗━━━┻━━━━┻━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━━┻━━┛\n"); } else { if (bum == 2) { return; } } printf("\n敲任意数回到主菜单"); getch(); } int statisMenu(void) { int bum; system("CLS"); printf("\n\n\n"); printf("\t\t┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓\n"); printf("\t\t┃ 1 显示学生成绩 ┃\n"); printf("\t\t┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫\n"); printf("\t\t┃ 2 返回主菜单 ┃\n"); printf("\t\t┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛\n"); printf("请按键选择："); bum = (int)(getch() - '0'); system("CLS"); return bum; } void inputData(Student *pHead,Student *node) { Student *p1 = node,*p2,*p3 = pHead; system("CLS"); printf("\t注意:姓名不能有空格，性别男用m表示，女用w表示，\n\t各科成绩应该大于0小于100，输入数据时请用空格隔开\n"); printf("\n\n\t请依次输入学生的学号、姓名、性别、语文、高数、英语、C语言、大物成绩\n"); scanf("%d%s %c%f%f%f%f%f", &p1->one.num, p1->name, &p1->one.sex, &p1->one.chin_score, &p1->one.math_score,&p1->one.engl_score, &p1->one.chem_score, &p1->one.phy_score); p2 = p3->next; while (1) { if (p1->one.sex != 'w'&& p1->one.sex != 'm') { p1->one.sex = getchar(); printf("性别输入不合法，请重新输入: "); p1->one.sex = getchar(); } else { break; } } while (1) { if (p2 == NULL) { break; } if (p2->one.num == p1->one.num && p2 != node) { printf("该学号已存在，请重新输入学号:"); scanf("%d", &p1->one.num); p2 = p3->next; } else { p2 = p2->next; } } p1->one.sum_score = (double)(p1->one.chin_score + p1->one.chin_score + p1->one.engl_score +p1->one.chem_score + p1->one.phy_score); p1->one.aver_score = p1->one.sum_score / 5; }