丢人现眼的大一下数据结构项目（我脸皮厚还是放网站上来存个档吧
用链表实现了对学生信息的读取，存储，排序的功能。
主要数据结构：链表，算法：冒泡排序
#include<cstdio>
#include<cstdlib>
#include<cstring>
struct Student{
char sno[12];
char sname[10];
char sex[4];
char major[20];
Student *next; //指向后继数据结点
}*StudentList;
struct Course{
char cno[10];
char cname[20];
int classHours;
Course *next;
}*CourseList;
struct Grade{
char sno[12];
char cno[10];
int score ;
Grade *next;
}*GradeList;
/*
struct allinfo{
};
*/
FILE *Open_File(int who, int rw){//打开哪个文件，打开方式如何
FILE *p;
switch(who){
case 1:{
if(rw) p = fopen("student.dat","w");
else p = fopen("student.dat","r");
break;
}
case 2:{
if(rw) p = fopen("course.dat","w");
else p = fopen("course.dat","r");
break;
}
case 3:{
if(rw) p = fopen("courseGrade.dat","w");
else p = fopen("courseGrade.dat","r");
break;
}
}
return p;
}
/*
以下是关于学生的代码
*/
Student* Read_Student(){
FILE *StuFile = Open_File(1, 0);//read
Student *head = (Student *) malloc(sizeof(Student));
Student *pre = head;
while(!feof(StuFile)){
Student *p = (Student *) malloc(sizeof(Student));
fscanf(StuFile, "%s%s%s%s", p->sno, p->sname, p->sex, p->major);
pre->next = p;
pre = p;
}
pre->next = NULL;
fclose(StuFile);
return head;
}
void BubbleSort_Student(){
for(int i = 1; i <= 10; i++){
Student *p = StudentList->next;
Student *pre = StudentList;
while(p != NULL && p->next != NULL ){//存在两个可以比较的结点
Student *pnext = p->next;
if(strcmp(p->sno, pnext->sno) > 0){
pre->next = pnext;
p->next = pnext->next;
pnext->next = p;
}
pre = p;
p = p->next;
}
}
}
void Print_Student(){
Student *p = StudentList->next;
printf("\nStudentList");
printf("\n---------------------\n");
while(p != NULL){
printf("%s %s %s %s", p->sno, p->sname, p->sex, p->major);
p = p->next;
if(p != NULL) printf("\n");
}
printf("\n---------------------\n\n");
}
void Write_Student(){
FILE *StuFile = Open_File(1, 1);//write
Student *p = (Student *) malloc(sizeof(Student));
for(int i = 1; i <= 10; i++){
printf("No.%2d:", i);
scanf("%s%s%s%s", p->sno, p->sname, p->sex, p->major);
fprintf(StuFile, "%s %s %s %s", p->sno, p->sname, p->sex, p->major);
if(i != 10) fprintf(StuFile, "\n");
}
free(p);
fclose(StuFile);
return;
}
/*
以下是关于课程的代码
*/
Course* Read_Course(){
FILE *CourseFile = Open_File(2, 0);//read
Course *head = (Course *) malloc(sizeof(Course));
Course *pre = head;
while(!feof(CourseFile)){
Course *p = (Course *) malloc(sizeof(Course));
fscanf(CourseFile, "%s%s%d", p->cno, p->cname, &p->classHours);
pre->next = p;
pre = p;
}
pre->next = NULL;
fclose(CourseFile);
return head;
}
void BubbleSort_Course(){
for(int i = 1; i <= 10; i++){
Course *p = CourseList->next;
Course *pre = CourseList;
while(p != NULL && p->next != NULL ){//存在两个可以比较的结点
Course *pnext = p->next;
if(strcmp(p->cno, pnext->cno) > 0){
pre->next = pnext;
p->next = pnext->next;
pnext->next = p;
}
pre = p;
p = p->next;
}
}
}
void Print_Course(){
Course *p = CourseList->next;
printf("\nCourseList");
printf("\n---------------------\n");
while(p != NULL){
printf("%s %s %d", p->cno, p->cname, p->classHours);
p = p->next;
if(p != NULL) printf("\n");
}
printf("\n---------------------\n\n");
}
void Write_Course(){
FILE *CourseFile = Open_File(2, 1);//write
Course *p = (Course *) malloc(sizeof(Course));
for(int i = 1; i <= 3; i++){
printf("No.%2d:", i);
scanf("%s%s%d", p->cno, p->cname, &p->classHours);
fprintf(CourseFile, "%s %s %d", p->cno, p->cname, p->classHours);
if(i != 3) fprintf(CourseFile, "\n");
}
free(p);
fclose(CourseFile);
return;
}
/*
以下是关于成绩的代码
*/
Grade* Read_Grade(){
FILE *GradeFile = Open_File(3, 0);//read
Grade *head = (Grade *) malloc(sizeof(Grade));
Grade *pre = head;
while(!feof(GradeFile)){
Grade *p = (Grade *) malloc(sizeof(Grade));
fscanf(GradeFile, "%s%s%d", p->sno, p->cno, &p->score);
pre->next = p;
pre = p;
}
pre->next = NULL;
fclose(GradeFile);
return head;
}
void BubbleSort_Grade(){
for(int i = 1; i <= 10; i++){
Grade *p = GradeList->next;
Grade *pre = GradeList;
while(p != NULL && p->next != NULL ){//存在两个可以比较的结点
Grade *pnext = p->next;
if(strcmp(p->sno, pnext->sno) > 0 || (strcmp(p->sno, pnext->sno) == 0 && strcmp(p->cno, pnext->cno) > 0) ){
pre->next = pnext;
p->next = pnext->next;
pnext->next = p;
}
pre = p;
p = p->next;
}
}
}
void Print_Grade(){
Grade *p = GradeList->next;
printf("\nGradeList");
printf("\n---------------------\n");
while(p != NULL){
printf("%s %s %d", p->sno, p->cno, p->score);
p = p->next;
if(p != NULL) printf("\n");
}
printf("\n---------------------\n\n");
}
void Write_Grade(){
FILE *GradeFile = Open_File(3, 1);//write
Grade *p = (Grade *) malloc(sizeof(Grade));
for(int i = 1; i <= 10; i++){
printf("No.%2d:", i);
scanf("%s%s%d", p->sno, p->cno, &p->score);
fprintf(GradeFile, "%s %s %d", p->sno, p->cno, p->score);
if(i != 10) fprintf(GradeFile, "\n");
}
free(p);
fclose(GradeFile);
return;
}
void BubbleSort_StudentsGrade(){
for(int i = 1; i <= 10; i++){
Grade *p = GradeList->next;
Grade *pre = GradeList;
while(p != NULL && p->next != NULL ){//存在两个可以比较的结点
Grade *pnext = p->next;
if(p->score < pnext->score){
pre->next = pnext;
p->next = pnext->next;
pnext->next = p;
}
pre = p;
p = p->next;
}
}
}
Student *Find_Student(char *num){
Student *p = StudentList->next;
do{
if(strcmp(p->sno, num) == 0) return p;
p = p->next;
}while(p != NULL);
p = (Student*) malloc(sizeof(Student));
char temp[3] = "-1";
strcpy(p->major, temp);
strcpy(p->sex, temp);
strcpy(p->sname, temp);
strcpy(p->sno, temp);
p->next = NULL;
return p;//返回错误
}
Course *Find_Course(char *num){
Course *p = CourseList->next;
do{
if(strcmp(p->cno, num) == 0) return p;
p = p->next;
}while(p != NULL);
p = (Course*) malloc(sizeof(Course));
char temp[3] = "-1";
strcpy(p->cname, temp);
strcpy(p->cno, temp);
p->classHours = -1;
p->next = NULL;
return p;//返回错误
}
void Print_All(Grade *p){
Student *s = Find_Student(p->sno);
Course *c = Find_Course(p->cno);
printf("%6s %6s %6s %6s %3d", s->sno, s->sname, s->major, c->cname, p->score);
}
void Print_Seven(){//Task7
Grade *p = GradeList->next;
printf("\nGradeList");
printf("\nnumber name major course grade");
printf("\n---------------------------------------\n");
while(p != NULL){
Print_All(p);
p = p->next;
if(p != NULL) printf("\n");
}
printf("\n---------------------------------------\n\n");
}
void Print_Eight(char* num){//Task8 指定课程号
Grade *p = GradeList->next;
printf("\nGradeList");
printf("\nnumber name major course grade");
printf("\n---------------------------------------\n");
while(p != NULL){
if(strcmp(p->cno, num) == 0) Print_All(p);
p = p->next;
if(p != NULL) printf("\n");
}
printf("\n---------------------------------------\n\n");
}
void Print_Nine(){//Task9
Grade *p = GradeList->next;
printf("\nGradeList");
printf("\nnumber name major course grade");
printf("\n---------------------------------------\n");
while(p != NULL){
if(p->score < 60) Print_All(p);
p = p->next;
if(p != NULL) printf("\n");
}
printf("\n---------------------------------------\n\n");
}
void ReverseStudent(){
Student *head = (Student*) malloc(sizeof(Student));
Student *p = StudentList->next;
head->next = NULL;
while(p != NULL){
Student *t = p->next;//暂时保存p的下一个结点
p->next = head->next;
head->next = p;
p = t;
}
StudentList = head;
}
void Queue_Push(Grade *p, Grade *&top, Grade *&rear){
if(top->next == NULL){
top->next = p;
rear->next = p;
}
else{
p->next = top;
top = p;
}
}
Grade* Queue_Pop(Grade *&top, Grade *&rear){
if(top->next == rear->next){
top->next = rear->next = NULL;
return top->next;
}else{
rear->next = top->next;
return rear->next;
}
}
void Print_Eleven(Grade *top, Grade *rear){
Grade *p = Queue_Pop(top, rear);
printf("\nGradeList");
printf("\nnumber name major course grade");
printf("\n---------------------------------------\n");
while(p != NULL){
Print_All(p);
p = p->next;
if(p != NULL) printf("\n");
}
printf("\n---------------------------------------\n\n");
}
int main(){
int opt;
Student *HEAD = NULL;
printf("Welcome to Students' score system!\n");
printf("1.Input students.\n");
printf("2.Input courses.\n");
printf("3.Input grades.\n");
printf("4.Output students.\n");
printf("5.Output courses.\n");
printf("6.Output grades.\n");
printf("7.Output all.\n");
printf("8.Output all of a course.\n");
printf("9.Output all below 60.\n");
printf("10.Reverse students.\n");
printf("11.Output all.\n");
while(1){
printf("\nPlease input an option:");
scanf("%d", &opt);
if(opt == -1) break;
switch(opt){
case 1:{
Write_Student();
printf("done.\n");
break;
}
case 2:{
Write_Course();
printf("done.\n");
break;
}
case 3:{
Write_Grade();
printf("done.\n");
break;
}
case 4:{
StudentList = Read_Student();
BubbleSort_Student();
Print_Student();
break;
}
case 5:{
CourseList = Read_Course();
BubbleSort_Course();
Print_Course();
break;
}
case 6:{
GradeList = Read_Grade();
BubbleSort_Grade();
Print_Grade();
break;
}
case 7:{
StudentList = Read_Student();
CourseList = Read_Course();
GradeList = Read_Grade();
BubbleSort_StudentsGrade();//按照成绩排序
Print_Seven();
break;
}
case 8:{
StudentList = Read_Student();
CourseList = Read_Course();
GradeList = Read_Grade();
BubbleSort_StudentsGrade();//按照成绩排序
char str[10];
printf("input course name:");
scanf("%s", str);
Print_Eight(str);
break;
}
case 9:{
StudentList = Read_Student();
CourseList = Read_Course();
GradeList = Read_Grade();
BubbleSort_StudentsGrade();//按照成绩排序
Print_Nine();
break;
}
case 10:{
StudentList = Read_Student();
ReverseStudent();//逆序生成新的链表
Print_Student();//输出该链表
break;
}
case 11:{
StudentList = Read_Student();
CourseList = Read_Course();
GradeList = Read_Grade();
BubbleSort_StudentsGrade();//按照成绩排序
Print_Seven();
break;
}
}
}
}
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