好久没玩过C语言了，上一次还是在大二的时候。。。废话不多说，这里有一个C语言实现的学生选课系统代码，分享给大家，具体如下：
#include<stdio.h> #include<stdlib.h>int N1,N2,kk1,kk2,kk3;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 Ms() {for (kk1=0;kk1<1100;kk1++) for (kk2=0;kk2<1200;kk2++) for (kk3=0;kk3<1200;kk3++);}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("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) {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 filec()//录入键盘子函数(从文件录入) {FILE * fp;char filepath[20];struct couse *p1,*p2;N1=0;printf("输入要读入的文件路径:");getchar();gets(filepath);if((fp=fopen(filepath,"r"))==NULL) {printf("找不到%s文件!\n",filepath);exit(0);}p1=p2=(struct couse*)malloc(sizeof(struct couse));fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);head1=NULL;while(!feof(fp)) {N1=N1+1;if(N1==1)head1=p1; else p2->next=p1;p2=p1;p1=(struct couse * )malloc(sizeof(struct couse));fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);}p2->next=NULL;}void inputc()//录入课程主函数 {int i;printf("\t\t\t录入课程信息\n");printf("\n1.从键盘录入\n");printf("2.从文件录入\n");printf("3.返回主菜单\n");printf("请选择(1~3):\n");scanf("%d",&i);switch(i) {case(1):keyboardc();break;case(2):filec();break;case(3):break;}}void insertc(struct couse *incouse)//课程管理子函数(增加课程) {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)//课程管理子函数(删除课程) {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("已删除该编号课程!\n");N1=N1-1;} else printf("无该编号的课程!\n");end:;}void managementc()//课程管理主函数 {struct couse * incouse;int i,num1;printf("\t\t\t课程管理\n");printf("1.新增课程\n");printf("2.删除课程\n");printf("3.返回主菜单\n");printf("请选择(1~3):\n");scanf("%d",&i);switch(i) {case(1): {incouse=(struct couse *)malloc(sizeof(struct couse));printf("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,&incouse->score,&incouse->Melepeo);incouse->nelepeo=0;insertc(incouse);break;}case(2): {printf("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("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 files()//录入学生信息子函数（从文件录入） {int i=0;FILE * fp;char filepath[20];struct student *p1,*p2;N2=0;printf("输入要读入的文件路径:");getchar();gets(filepath);if((fp=fopen(filepath,"r"))==NULL) {printf("找不到%s文件!\n",filepath);exit(0);}p1=p2=(struct student*)malloc(sizeof(struct student));fread(p1,sizeof(struct student),1,fp);head2=NULL;while(!feof(fp)) {i=0;N2=N2+1;if(N2==1)head2=p1; else p2->next=p1;p2=p1;p1=(struct student * )malloc(sizeof(struct student));fread(p1,sizeof(struct student),1,fp);}p2->next=NULL;}void inputs()//录入学生信息主函数 {int i;printf("\t\t\t录入学生信息\n");printf("\n1.从键盘录入\n");printf("2.从文件录入\n");printf("3.返回主菜单\n");printf("请选择(1~3):\n");scanf("%d",&i);switch(i) {case(1):keyboards();break;case(2):files();break;case(3):break;}}void inserts(struct student * incouse)//学生信息管理子函数(填加学生信息) {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)//学生信息管理子函数（删除学生信息) {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("已删除该学生信息!\n");N2=N2-1;} else printf("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("\t\t\t学生信息管理\n");printf("1.新增学生信息\n");printf("2.删除学生信息\n");printf("3.返回主菜单\n");printf("请选择(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("学生学号\t学生姓名\n");scanf("%d%s",&incouse->num2,incouse->name2);inserts(incouse);break;}case(2): {printf("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)//选课 {struct couse * p;int num1,i;printf("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("请输入你的学号:");scanf("%d",&num2);s=head2;while(s->num2!=num2 && s->next!=NULL) s=s->next;if(s->num2!=num2) {printf("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("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\n",c->num1);j++;}c=c->next;}if(j==0) {printf("你已选完所有课程，无法再多选!\n");goto end;}printf("选课(y/n)?:\n");getchar();e=getchar();i=0;while(e=='y') {elect(s);printf("继续选课(y/n)?:\n");getchar();e=getchar();}end:;}void back(struct student * p)//退课 {struct couse * p1;int num1,i,j;printf("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("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("请输入学号:\n");scanf("%d",&num2);p=head2;while(p->num2!=num2 && p!=NULL) p=p->next;if(p==NULL) {printf("不存在你的信息,请回主菜单录入信息:\n");goto end;}printf("已选课程编号:\n");if(p->nelenum[0]==0) {printf("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("总学分:%d\n",f);printf("是否进行退课(y/n)?");getchar();c=getchar();while(c=='y') {back(p);printf("继续退课(y/n)?");getchar();c=getchar();(p->nelen)--;}end:;}void elective()//学生选课主函数 {int i;printf("\t\t\t学生选课\n");printf("1.查询可选课程\n");printf("2.查询已选课程\n");printf("3.返回主菜单\n");printf("请输入(1~3):\n");scanf("%d",&i);switch(i) {case(1):cheak();break;case(2):hcheak();break;case(3):break;}}void listc()//输出课程信息 {struct couse * p;p=head1;printf("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->score,p->nelepeo,p->Melepeo);p=p->next;}}void lists()//输出学生信息 {struct student * p;p=head2;printf("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 intoc()//存储课程信息 {FILE * fp;struct couse * p;char filepath[30];printf("输入课程信息要保存的文件路径:");getchar();gets(filepath);if((fp=fopen(filepath,"w"))==NULL) {printf("\n保存失败!");exit(0);}p=head1;while(p!=NULL) {fprintf(fp,"%d %s %d %d %d\n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo);p=p->next;}fclose(fp);printf("课程信息已保存在%s中!\n",filepath);}void intos()//存储学生信息 {FILE * fp;struct student * p;char filepath[30];printf("输入学生信息要保存的文件路径:");getchar();gets(filepath);if((fp=fopen(filepath,"w"))==NULL) {printf("\n保存失败!");exit(0);}p=head2;while(p!=NULL) {fwrite(p,sizeof(struct student),1,fp);p=p->next;}fclose(fp);printf("学生信息已保存在%s中!\n",filepath);}void into()//存储信息 {int i;printf("1.存储课程信息\n");printf("2.存储学生信息\n");printf("3.返回主菜单\n");printf("请输入(1~3)\n");scanf("%d",&i);switch(i) {case(1):intoc();break;case(2):intos();break;case(3):break;}}void store()//信息主函数 {int i;printf("\t\t系统信息查看及存储\n");printf("1.查看课程信息\n");printf("2.查看学生信息\n");printf("3.存储信息\n");printf("4.返回主菜单\n");printf("请输入(1~4):\n");scanf("%d",&i);switch(i) {case(1):listc();break;case(2):lists();break;case(3):into();break;case(4):break;}}int main()//主函数 {int i;start: printf("\n\t\t\t欢迎使用学生选课系统!\n");printf("菜单:\n");printf("1.录入课程信息\n");printf("2.课程管理\n");printf("3.录入学生信息\n");printf("4.学生信息管理\n");printf("5.学生选课\n");printf("6.系统信息查看及存储\n");printf("7.退出系统\n");printf("\n请输入菜单选项(1~7):\n");scanf("%d",&i);if(i<1 || i>7) {printf("输入错误,请重输:\n");goto start;}switch(i) {case(1): {system("cls");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("感谢使用本系统!\n\n再见!\n");}}return(0);}
总结
以上就是本文关于C语言实。现的学生选课系统代码分享的全部内容，希望对大家有所帮助。感兴趣的朋友可以继续参阅本站：C/C++ 编译器优化介绍等。如有不足之处，欢迎留言指出。
当你能爱的时候就不要放弃爱
