diff --git a/search.cpp b/search.cpp
new file mode 100644
index 0000000..43bcac1
--- /dev/null
+++ b/search.cpp
@@ -0,0 +1,67 @@
+void search()//课程信息查询
+{
+int mai_n();
+FILE *fp;
+struct course c;
+int xuefen,time;
+char kind[10];
+int a,b;
+printf("1.按学分查询./   /2.按课程性质查询./    /3.按开课学期查询\n");
+printf("请选择查询方式，输入选项数字：   ");
+scanf("%d",&b);
+if(b==1)
+{
+printf("\n 请输入要查询的学分:\n");
+scanf("%d",&xuefen);
+if((fp=fopen("course.txt","r"))==NULL)
+{
+printf("\nCannot open course!\n");
+}
+printf("课程编号 课程名称 课程性质 总学时 授课学时 实验或上机学时 学分 开课学期:\n");
+for(;!feof(fp);)//文件到结尾前运行 
+{fscanf(fp,"%d%s%s%d%d%d%d%d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
+if(c.mark==xuefen)
+printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
+}
+}
+else if(b==2){
+printf("\n 请输入要查询的课程性质:\n");
+scanf("%s",&kind);
+if((fp=fopen("course.txt","r"))==NULL)
+{
+printf("\nCannot open course!\n");
+}
+printf("课程编号 课程名称 课程性质 总学时 授课学时 实验或上机学时 学分 开课学期:\n");
+for(;!feof(fp);)
+{
+fscanf(fp,"%d%s%s%d%d%d%d%d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
+if(strcmp(c.kind,kind)==0)
+printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
+}
+}
+else if(b==3){
+printf("\n 请输入要查询的课程开课学期；\n");
+scanf("%d",&time);
+if((fp=fopen("course.txt","r"))==NULL)
+{
+printf("\nCannot open course!\n");
+}
+printf("课程编号 课程名称 课程性质 总学时 授课学时 实验或上机学时 学分 开课学期:\n");
+for(;!feof(fp);)
+{fscanf(fp,"%d%s%s%d%d%d%d%d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
+if(c.term==time)
+printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
+}
+}
+else{
+printf("输入错误！");
+exit(1);
+}
+fclose(fp);
+printf("\n1-返回菜单；2-退出系统\n");
+scanf("%d",&a);system("cls");//清屏
+if(a==1)
+mai_n();
+else
+exit(0);
+}
diff --git a/xuan_ke.cpp b/xuan_ke.cpp
new file mode 100644
index 0000000..26a9a27
--- /dev/null
+++ b/xuan_ke.cpp
@@ -0,0 +1,45 @@
+void xuan_ke()//学生选修课程
+{
+int mai_n();
+struct student s;
+struct course c;
+int a;
+FILE *fp;
+if((fp=fopen("course.txt","r"))==NULL)//文件没有内容报错
+{
+printf("\nCannot open course!\n");
+}
+printf("课程编号 课程名称 课程性质 总学时 授课学时 实验或上机学时 学分开课学期:\n");
+for(;!feof(fp);)
+{
+fscanf(fp,"%d %s %s %d %d %d %d %d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
+printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
+}
+fclose(fp);
+printf("*@********#*******************************&****^**^*****&********************************#*****@**\n");
+printf("\n 请输入您的学号     及    您要选择的课程编号:\n");
+scanf("%d%d",&s.snum,&s.cnum);
+if((fp=fopen("course.txt","r"))==NULL)
+{
+printf("\nCannot open course!\n");
+}
+for(;!feof(fp);)
+{
+fscanf(fp,"%d %s %s %d %d %d %d %d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
+if(s.cnum==c.num)
+break;
+}
+fclose(fp);
+if((fp=fopen("student.txt","a+"))==NULL)
+{
+printf("\nCannot open student!\n");
+}
+fprintf(fp,"%d %d %s\n",s.snum,s.cnum,c.name);
+fclose(fp);
+printf("\n1-返回菜单；2-退出系统\n");
+scanf("%d",&a);system("cls");//清屏
+if(a==1)
+mai_n();
+else
+exit(0);
+}
diff --git a/xuanke_information.cpp b/xuanke_information.cpp
new file mode 100644
index 0000000..a6802c8
--- /dev/null
+++ b/xuanke_information.cpp
@@ -0,0 +1,26 @@
+void xuanke_information()//统计选课情况
+{
+int mai_n();
+int total=0;
+int a;
+FILE *fp;
+struct student s;
+if((fp=fopen("student.txt","r"))==NULL)//文件没有内容报错 
+{
+printf("\nCannot open student!\n");
+}
+printf(" 学号 课程编号 课程名称\n");
+for(;!feof(fp);)
+{fscanf(fp,"%d%d%s\n",&s.snum,&s.cnum,&s.cname);
+total++;
+printf("%7d%9d%13s\n",s.snum,s.cnum,s.cname);
+}
+printf("\n 选课学生总人数为：%d 人",total);
+fclose(fp);
+printf("\n1-返回菜单；2-退出系统\n");
+scanf("%d",&a);system("cls");//清屏
+if(a==1)
+mai_n();
+else
+exit(0);
+}