C语言学生选课系统(代码)

1#includestdio.h#includestdlib.h#includestring.hintN1,N2;structstudent{intnum2;charname2[20];intnelenum[50];//所选课程编号intnelen;//所选课程学分和structstudent*next;};structcourse{intnum1;//课程编号charname1[20];charmajor[20];chartype[20];intcredit;intperiod;charteacher[20];intpeople;//选此门课程的人数structcourse*next;//结构体指针};structcourse*head1;structstudent*head2;voidzhang()//从键盘录入课程信息{structcourse*p1,*p2;N1=0;p1=p2=(structcourse*)malloc(sizeof(structcourse));2printf(课程编号\t课程名称\t主修\t课程性质\t学分\t课时\t教师\n);scanf(%d%s%s%s%d%d%s,&p1-num1,p1-name1,p1-major,p1-type,&p1-credit,&p1-period,p1-teacher);p1-people=0;head1=NULL;while(p1-num1!=0){N1=N1+1;if(N1==1)head1=p1;elsep2-next=p1;p2=p1;p1=(structcourse*)malloc(sizeof(structcourse));scanf(%d%s%s%s%d%d%s,&p1-num1,p1-name1,p1-major,p1-type,&p1-credit,&p1-period,p1-teacher);p1-people=0;}p2-next=NULL;}voidzhang1()//从文件录入课程信息{FILE*fp;charfilepath[20];structcourse*p1,*p2;N1=0;printf(请输入您要读取的路径:);getchar();gets(filepath);if((fp=fopen(filepath,r))==NULL){3printf(找不到%s文件!\n,filepath);exit(0);}p1=p2=(structcourse*)malloc(sizeof(structcourse));fscanf(fp,%d%s%s%s%d%d%s%d,&p1-num1,p1-name1,p1-major,p1-type,&p1-credit,&p1-period,p1-teacher,&p1-people);while(!feof(fp)){N1=N1+1;if(N1==1)head1=p1;elsep2-next=p1;p2=p1;p1=(structcourse*)malloc(sizeof(structcourse));fscanf(fp,%d%s%s%s%d%d%s%d,&p1-num1,p1-name1,p1-major,p1-type,&p1-credit,&p1-period,p1-teacher,&p1-people);}p2-next=NULL;}voidload()//录入课程信息函数{inti;printf(\t\t\t录入课程信息\n);printf(\n1.从键盘录入);printf(\n2.从文件录入);printf(\n3.返回主菜单\n);printf(请选择1-3:);scanf(%d,&i);4switch(i){case1:zhang();break;case2:zhang1();break;case3:break;}}voidinsert(structcourse*incourse)//增加课程信息{structcourse*p0,*p1,*p2;p1=head1;p0=incourse;if(head1==NULL){head1=p0;p0-next=NULL;}else{while((p0-num1p1-num1)&&(p1-next!=NULL)){p2=p1;p1=p1-next;}if(p0-num1=p1-num1){if(head1==p1)head1=p0;elsep2-next=p0;p0-next=p1;5}else{p1-next=p0;p0-next=NULL;}}N1=N1+1;}voiddelc(intnum1)//删除课程信息{structcourse*p1,*p2;if(head1==NULL){printf(\n无法删除!\n);gotoend;}p1=head1;while(num1!=p1-num1&&p1-next!=NULL){p2=p1;p1=p1-next;}if(num1==p1-num1){if(p1==head1)head1=p1-next;elsep2-next=p1-next;printf(已删除\n);N1=N1-1;6}elseprintf(没有此课程\n);end:;}voidmanagementc()//课程信息管理函数{structcourse*p1;inti,num1;printf(\t\t\t课程信息管理\n);printf(1.添加课程\n);printf(2.删除课程\n);printf(3.返回\n);printf(请输入1-3:\n);scanf(%d,&i);switch(i){case1:{p1=(structcourse*)malloc(sizeof(structcourse));printf(课程编号\t课程名称\t主修\t课程性质\t学分\t课时\t教师\n);scanf(%d%s%s%s%d%d%s,&p1-num1,p1-name1,p1-major,p1-type,&p1-credit,&p1-period,p1-teacher);p1-people=0;insert(p1);}break;case2:printf(请输入您要删除的课程编号:\n);scanf(%d,&num1);delc(num1);break;case3:break;}}7voidputin(void)//从键盘录入学生信息{inti;structstudent*p1,*p2;N2=0;p1=p2=(structstudent*)malloc(sizeof(structstudent));printf(学号\t姓名\n);scanf(%d%s,&p1-num2,p1-name2);p1-nelen=0;for(i=0;i20;i++)p1-nelenum[i]=0;head2=NULL;while(p1-num2!=0){N2=N2+1;if(N2==1)head2=p1;elsep2-next=p1;p2=p1;p1=(structstudent*)malloc(sizeof(structstudent));scanf(%d%s,&p1-num2,p1-name2);p1-nelen=0;for(i=0;i20;i++)p1-nelenum[i]=0;}p2-next=NULL;}voidputin2()//从文件录入学生信息{inti=0;FILE*fp;charfilepath[20];structstudent*p1,*p2;8N2=0;printf(请输入您要读取的路径:);getchar();gets(filepath);if((fp=fopen(filepath,rt))==NULL){printf(找不到%s文件!\n,filepath);exit(0);}p1=p2=(structstudent*)malloc(sizeof(structstudent));fread(p1,sizeof(structstudent),1,fp);head2=NULL;while(!feof(fp)){i=0;N2=N2+1;if(N2==1)head2=p1;elsep2-next=p1;p2=p1;p1=(structstudent*)malloc(sizeof(structstudent));fread(p1,sizeof(structstudent),1,fp);}p2-next=NULL;}voidinput()//录入学生信息函数{inti;printf(\t\t\t录入学生信息\n);printf(\n1.从键盘录入\n);9printf(2.从文件录入\n);printf(3.返回主菜单\n);printf(请输入1-3:\n);scanf(%d,&i);switch(i){case1:putin();break;case2:putin2();break;case3:break;}}voidinserts(structstudent*incouse)//增加学生信息{structstudent*p0,*p1,*p2;p1=head2;p0=incouse;if(head2==NULL){head2=p0;p0-next=NULL;}else{while((p0-num2p1-num2)&&(p1-next!=NULL)){p2=p1;p1=p1-next;}if(p0-num2=p1-num2){if(head2==p1)head2=p0;10elsep2-next=p0;p0-next=p1;}else{p1-next=p0;p0-next=NULL;}}N2=N2+1;}voiddels(intnum2)//删除学生信息{structstudent*p1,*p2;if(head2==NULL){printf(\n无法删除\n);gotoend;}p1=head2;while(num2!=p1-num2&&p1-next!=NULL){p2=p1;p1=p1-next;}if(num2==p1-num2){if(p1==head2)head2=p1-next;elsep2-next=p1-next;printf(已删除\n);11N2=N2-1;}elseprintf(没有此学生编号\n);end:;}voidmanagements()//学生信息管理函数{structstudent*p1;inti,num2;printf(\t\t\t学生信息管理\n);printf(1.添加学生信息\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){case1:{p1=(structstudent*)malloc(sizeof(structstudent));p1-nelen=0;p1-nelenum[0]=0;printf(num\tname\n);scanf(%d%s,&p1-num2,p1-name2);inserts(p1);}break;case2:{printf(请输入您要删除的学生编号:\n);scanf(%d,&num2);dels(num2);}break;case3:break;}}12voidelect()//学生选课{structstudent*s;structcourse*p;inta,i,b;printf(请输入您的学号:\n);scanf(%d,&a);s=head2;while((s-num2)!=a&&s-next!=NULL)s=s-next;if(s-num2!=a){printf(您的信息不存在，请重新输入:\n);gotoen