学生选课系统C语言程序代码

#include<stdio.h>#include<stdlib.h>struct couse * head1;struct student * head2;struct couse//课程信息结构体{int num1;char name1[20];int score;int nelepeo;//课程已选人数int Melepeo;//课程人数上限struct couse * next;};struct student//学生信息结构体{int num2;char name2[20];int nelenum[50];//已选课程编号int nelen;//已选课程数量struct student * next;};void keyboardc()//录入课程子函数(从键盘录入)struct couse *p1,*p2;N1=0;p1=p2=(struct couse*)malloc(sizeof(struct couse));printf("\n课程编号\t课程名称\t学分\t课程人数上限\n"); scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);p1->nelepeo=0;head1=NULL;while(p1->num1!=0&&p1->num1!='#'){N1=N1+1;if(N1==1)head1=p1;else p2->next=p1;p2=p1;p1=(struct couse * )malloc(sizeof(struct couse));scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);p1->nelepeo=0;}p2->next=NULL;void inputc()//录入课程主函数{int i;printf("\n录入课程信息\n");printf("\n1.从键盘录入\n");printf("\n2.返回主菜单\n");printf("\n请选择编号(1~3):\n");scanf("%d",&i);switch(i){case(1):keyboardc();break;case(2):break;}}void insertc(struct couse *incouse)//课程信息增加子函数{struct couse *p0,*p1,*p2;p1=head1;p0=incouse;if(head1==NULL){head1=p0;p0->next=NULL;}else{while((p0->num1>p1->num1)&&(p1->next!=NULL)) {p2=p1;p1=p1->next;}if(p0->num1 <= p1->num1){if(head1==p1) head1=p0;else p2->next=p0;p0->next=p1;}else{p1->next=p0;p0->next=NULL;}}N1=N1+1;}void delc(int num1)//课程信息删除子函数{struct couse *p1,*p2;if(head1==NULL){printf("\n没有课程,无法删除!\n");goto end;}p1=head1;while(num1!=p1->num1 && p1->next!=NULL) {p2=p1;p1=p1->next;}if(num1==p1->num1){if(p1==head1) head1=p1->next;else p2->next=p1->next;printf("\n已删除该编号课程!\n");N1=N1-1;}else printf("\n无该编号的课程!\n");end:;}void managementc()//课程信息管理主函数{struct couse * incouse;int i,num1;printf("\n课程管理\n");printf("\n1.新增课程\n");printf("\n2.删除课程\n");printf("\n3.返回主菜单\n");printf("\n请选择编号(1~3):\n");scanf("%d",&i);switch(i){case(1):{incouse=(struct couse *)malloc(sizeof(struct couse));printf("\n课程编号\t课程名称\t学分\t课程人数上限\n");scanf("%d%s%d%d",&incouse->num1,incouse->name1,&incou se->score,&incouse->Melepeo);incouse->nelepeo=0;insertc(incouse);break;}case(2):{printf("\n请输入要删除课程的编号:\n");scanf("%d",&num1);delc(num1);break;}case(3):break;}}void keyboards()//录入学生信息子函数（从键盘录入）{int i;struct student *p1,*p2;N2=0;p1=p2=(struct student *)malloc(sizeof(struct student));printf("\n学生学号\t学生姓名\n");scanf("%d%s",&p1->num2,p1->name2);p1->nelen=0;for(i=0;i<20;i++) p1->nelenum[i]=0;head2=NULL;while(p1->num2!=0){N2=N2+1;if(N2==1)head2=p1;else p2->next=p1;p2=p1;p1=(struct student * )malloc(sizeof(struct student));scanf("%d%s",&p1->num2,p1->name2);p1->nelen=0;for(i=0;i<20;i++) p1->nelenum[i]=0;}p2->next=NULL;}void inputs()//录入学生信息主函数{int i;printf("\n录入学生信息\n");printf("\n1.从键盘录入\n");printf("\n2.返回主菜单\n");printf("\n请选择编号(1~2):\n");scanf("%d",&i);switch(i){case(1):keyboards();break;case(2):break;}}void inserts(struct student * incouse)//学生信息增加子函数{struct student *p0,*p1,*p2;p1=head2;p0=incouse;if(head2==NULL){head2=p0;p0->next=NULL;}else{while((p0->num2 > p1->num2) && (p1->next!=NULL)){p2=p1;p1=p1->next;}if(p0->num2 <= p1->num2){if(head2==p1) head2=p0;else p2->next=p0;p0->next=p1;}else{p1->next=p0;p0->next=NULL;}}N2=N2+1;}void dels(int num2)//学生信息删除子函数struct student *p1,*p2;if(head2==NULL){printf("\n没有该学生信息,无法删除!\n");goto end;}p1=head2;while(num2!=p1->num2 && p1->next!=NULL) {p2=p1;p1=p1->next;}if(num2==p1->num2){if(p1==head2) head2=p1->next;else p2->next=p1->next;printf("\n已删除该学生信息!\n");N2=N2-1;}else printf("\n无该学号的学生!\n");end:;void managements()//学生信息管理主函数{struct student * incouse;int i,num2;printf("\n学生信息管理\n");printf("\n1.新增学生信息\n");printf("\n2.删除学生信息\n");printf("\n3.返回主菜单\n");printf("\n请选择编号(1~3):\n");scanf("%d",&i);switch(i){case(1):{incouse=(struct student *)malloc(sizeof(struct student));incouse->nelen=0;incouse->nelenum[0]=0;printf("\n学生学号\t学生姓名\n");scanf("%d%s",&incouse->num2,incouse->name2);inserts(incouse);break;}case(2):{printf("\n请输入要删除学生的学号:\n");scanf("%d",&num2);dels(num2);break;}case(3):break;}}void elect(struct student * s)//学生选课子函数（进行选课）{struct couse * p;int num1,i;printf("\n请输入要选课的编号:\n");scanf("%d",&num1);for(i=0;s->nelenum[i]!=0;i++);s->nelenum[i]=num1;(s->nelen)++;p=head1;while(p->num1!=num1) p=p->next;(p->nelepeo)++;}void cheak()//学生选课子函数(查询可选课程){char e;struct couse * c;struct student * s;int num2,i,j=0,t=0;printf("\n请输入你的学号:\n");scanf("%d",&num2);s=head2;while(s->num2!=num2 && s->next!=NULL) s=s->next;if(s->num2!=num2){printf("\n不存在你的信息,请进入主菜单录入你的信息!\n");goto end;}c=head1;printf("\n你的可选课程编号:\n");while(c!=NULL){for(t=0,i=0;s->nelenum[i]!=0;i++){if(c->num1==s->nelenum[i]) t=1;}if(t==0 && (c->nelepeo!=c->Melepeo)){printf("%d ",c->num1);j++;}c=c->next;}if(j==0){printf("\n你已选完所有课程，无法再多选!\n");goto end;}printf("\n选课(y/n)?:\n");getchar();e=getchar();i=0;while(e=='y'){elect(s);printf("\n继续选课(y/n)?:\n");getchar();e=getchar();}end:;}void back(struct student * p)//退选课程{struct couse * p1;int num1,i,j;printf("\n请输入你要退掉的课程编号:\n");scanf("%d",&num1);p1=head1;while(p1->num1!=num1) p1=p1->next;for(i=0;p->nelenum[i]!=num1;i++);for(j=i;p->nelenum[j]!=0;j++)p->nelenum[j]=p->nelenum[j+1];p->nelenum[--j]=0;(p1->nelepeo)--;printf("\n退课成功!\n");}void hcheak()//学生选课子函数（查询已选课程){char c;struct couse * p0;struct student * p;int num2,i,f=0;printf("\n请输入学号:\n");scanf("%d",&num2);p=head2;while(p->num2!=num2 && p!=NULL) p=p->next;if(p==NULL){printf("\n不存在你的信息,请回主菜单录入信息:\n");goto end;}printf("\n已选课程编号:\n");if(p->nelenum[0]==0){printf("\n你还没选课!\n");goto end;}for(i=0;p->nelenum[i]!=0;i++){printf("%d\n",p->nelenum[i]);p0=head1;while(p0->num1!=p->nelenum[i]) p0=p0->next;f=f+p0->score;}printf("\n总学分:%d\n",f);printf("\n是否进行退课(y/n)?\n");getchar();c=getchar();while(c=='y'){back(p);printf("\n继续退课(y/n)?");getchar();c=getchar();(p->nelen)--;}end:;}void elective()//学生选课主函数{int i;printf("\n学生选课\n");printf("\n1.查询可选课程\n");printf("\n2.查询已选课程\n");printf("\n3.返回主菜单\n");printf("\n请输入(1~3):\n");scanf("%d",&i);switch(i){case(1):cheak();break;case(2):hcheak();break;case(3):break;}}void listc()//查看课程信息{struct couse * p;p=head1;printf("\n课程编号课程名称学分课程已选人数课程人数上限\n");while(p!=NULL){printf("%-8d%10s%6d%8d%12d\n",p->num1,p->name1,p->sco re,p->nelepeo,p->Melepeo);p=p->next;}}void lists()//查看学生信息{struct student * p;p=head2;printf("\n学生学号学生姓名已选课程数量\n");while(p!=NULL){printf("%-4d %10s %6d\n",p->num2,p->name2,p->nelen);p=p->next;}}void store()//系统信息查看主函数{int i;printf("\n系统信息查看\n");printf("\n1.查看课程信息\n");printf("\n2.查看学生信息\n");printf("\n3.返回主菜单\n");printf("\n请输入编号(1~3):\n");scanf("%d",&i);switch(i){case(1):listc();break;case(2):lists();break;case(3):break;}}int main()//主函数{system("color f0");int i;start:printf("\n******************************欢迎使用学生选课系统******************************\n");printf("\n 菜单\n");printf("\n 1.录入课程信息\n");printf("\n 2.课程信息管理\n");printf("\n 3.录入学生信息\n");printf("\n 4.学生信息管理\n");printf("\n 5.进入选课程序\n");printf("\n 6.系统信息查看\n");printf("\n 7.退出选课系统\n");printf("\n☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆\n");printf("\n请输入菜单选项编号(1~7):\n");scanf("%d",&i);if(i<1 || i>7){printf("\n输入错误,请重输:\n");goto start;}switch(i){case(1):{system("cls");//清屏函数inputc();goto start;break;}case(2):{system("cls");managementc();goto start;break;}case(3):{system("cls");inputs();goto start;break;}case(4):{system("cls");managements();goto start;break;}case(5):{system("cls");elective();goto start;break;}case(6):{system("cls");store();goto start;break;}case(7):{system("cls");printf("\n感谢使用本系统!再见!\n");}}return(0);}。