curriculum design final

课程设计（final）.cpp

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+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+#include<windows.h>
+#include<conio.h>
+typedef struct exam_system       //定义链表 
+{
+ char problem[150];    
+ char answer[4][20];     
+ char right;         
+ char input;
+ struct exam_system *next;
+}EXAM;                           //类型名自定义 
+
+void management();               //题目管理函数 
+void add();                      //添加题目函数 
+void show();                     //遍历题库函数 
+void preservation();             //保存文档函数 
+void change();                   //修改题目函数 
+void exam();                     //考试初始界面函数 
+void link();                     //创建链表函数 
+void Answer();                   //答题函数 
+
+int sum;                         //题目总数
+struct exam_system *p1,*p2,*head;
+FILE *fp;
+
+int main()
+{
+ link();
+ system("color 75");             //自定义background 
+ exam();
+ return 0;
+}
+
+void link()                                   //创建链表
+{ 
+ head=(EXAM *)malloc(sizeof(EXAM));           //创建头节点,并给予一个动态内存 
+ p2=p1=head;                                  //连续赋值 
+ p1->next=NULL;                               //令p1指向末尾 
+ if((fp=fopen("D:\\exam.txt","r+"))==NULL)
+ { 
+    printf("文件打开失败！！");
+	exit(0); 
+ }
+ while(1)
+ {
+     p1=(EXAM*)malloc(sizeof(EXAM));
+	 if(fread(p1,sizeof(EXAM),1,fp)==0)     //读取信息 
+	 break;                                 //否则退出 
+     p2->next=p1;                           //与第一个节点连接
+     p2=p1;                                 //p1与p2同时指向新开辟的节点
+     sum++;                                
+     p2->next=NULL;                         //另p2指向末尾 
+ }
+ fclose(fp);
+}
+
+void exam()                                 //考试界面函数 
+{
+ int x;
+ system("cls");  
+ printf("\t\t*********欢迎来到单项选择题考试系统*********\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t*               1.题目管理                 *\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t*               2.开始考试                 *\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t*               3.退出                     *\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t********************************************\n");
+ printf("\n");
+ printf("请选择：");
+ scanf("%d",&x);
+ switch(x)
+ {
+ case 1:management();break;
+ case 2:Answer();break;
+ case 3:exit(0);break;
+ default :printf("输入有误！\n");break;
+ }
+}
+
+void management()                          //题目管理函数 
+{
+ int x;
+ system("cls");  
+ printf("\t\t************欢迎来到题目管理系统************\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t*               1.新增题目                 *\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t*               2.遍历题库                 *\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t*               3.修改题目                 *\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t*               4.返回上一级               *\n");
+ printf("\t\t*                                          *\n");
+ printf("\t\t********************************************\n");
+ printf("\n");
+ printf("请选择：");
+ scanf("%d",&x);
+ switch(x)
+ {
+ case 1:add();management();break;
+ case 2:show();management();break;
+ case 3:change();management();break; 
+ case 4:;exam();break;
+ default :printf("输入有误！\n");break;
+ }
+}
+
+void preservation()                         //保存文档函数 
+{
+ EXAM *current=NULL;
+ current=head->next;
+ fp=fopen("D:\\exam.txt","w+");        
+ do
+ {
+    fwrite(current,sizeof(EXAM),1,fp);      //逐个存储 
+    current=current->next;                  //当前指针指向下一个 
+ }while(current!=NULL);                     //直到指向末尾 
+ fclose(fp);
+ printf("\n保存成功！！");
+ getch();
+}
+
+void show()                             //遍历题库函数 
+{
+ int c,i;
+ EXAM *p=NULL;
+ system("cls");
+ if(sum==0)
+ {
+ printf("题库中没有题目！\n");
+ printf("按任意键继续！");
+ getch();
+ }
+else
+ {
+  p=head;
+  i=0;
+  do
+  { 
+   p=p->next;
+   printf("%d.%s\n",i+1,p->problem);
+   c=0;
+   while(c<4)
+   {
+    printf("%c:",c+'A');
+     printf("%s\n",p->answer[c++] );
+   }
+   printf("正确答案:");
+   printf("%c\n",p->right);
+   i=i+1;
+   printf("\n-------------------------------------------------------------\n");
+  }while(p->next!=NULL);
+  p=NULL;
+  printf("按任意键继续！\n");
+  getch();
+ }
+}
+
+void add()                               //题目添加函数 
+{
+ int x,i;
+ system("cls");
+ printf("\t\t**************欢迎来到题目管理系统****************\n");
+ do
+ {
+        p1=(EXAM *)malloc(sizeof(EXAM));  
+        p2->next=p1;                     //相连p1、p2 
+        p2=p1;                           //指向相同 
+        printf("请输入第%d个题目：",sum+1);
+        scanf("%s",p1->problem);
+        printf("请输入备选答案：\n");
+        for(i=0;i<4;i)
+        {
+          printf("%c)",i+'A');
+          scanf("%s",p1->answer[i++] ); 
+        }
+        printf("输入正确答案：");
+        p1->right =getchar();
+        scanf("%c",&p1->right );
+        sum+=1;
+        printf("\n");
+        printf("\t是否继续添加\n\t1.继续\n\t2.退出\n请选择：");
+        scanf("%d",&x);
+        if(x==2)
+        {
+           p2->next=NULL;   
+           break;
+        }
+        system("cls");
+ }while(x==1);
+ preservation();
+}
+
+void change()                                 //修改题目函数 
+{
+ int i,num;
+ EXAM *p1=NULL;
+ EXAM *p2=NULL;
+ show();
+ if(sum>=1)
+ {
+     p1=(EXAM *)malloc(sizeof(EXAM));         //为P1分配一个动态内存 
+     p2=head;                              
+     printf("请选择修改的题目序号：");
+     scanf("%d",&num);
+     for(i=0;i<num-1;i++)
+     {
+        p2=p2->next;
+     }                                        //此时p2终于依次挪到num-1处 
+     printf("请输入题目：");
+     scanf("%s",p1->problem);
+     printf("请输入备选答案：\n");
+     for(i=0;i<4;)
+     {
+      printf("%c:",i+'A');
+      scanf("%s",p1->answer[i++] ); 
+     }
+     printf("输入正确答案：");
+     p1->right=getchar();
+     scanf("%c",&p1->right);
+     p1->next=p2->next->next;                 //此时新节点将代替原节点
+     p2->next=p1;                             //p1、p2连接
+     p1=NULL; 
+     p2=NULL;                                 //最后都置为末尾 
+     preservation();
+ }
+}
+
+void Answer()                               //答题函数 
+{
+   int i,j,c;
+   int n;
+   int score=0;
+   EXAM *p=NULL;
+   printf("祝你考试顺利！！\n");
+   system("cls");
+   if(sum>0)
+    {
+        i=0;
+        p=head;
+        printf("请输入你需要的题量：");
+		scanf("%d",&n);
+        do
+        {
+		  p=p->next;                      //更新指针，输出下一个结构体的数据 
+          printf("%d.%s\n",i+1,p->problem);
+          c=0;
+          while(c<4)
+          {
+              printf("%c:",c+'A');
+              printf("%s\n",p->answer[c++] );
+          }
+          printf("请输入你的答案：");
+          p->input=getchar();
+          scanf("%c",&p->input);
+          if(p->right==p->input)
+		  {
+		  	printf("\n恭喜！！你的答案是 %c ，正确答案是 %c ",p->input,p->right);
+		  	score+=1;
+		  }
+		  else
+		  {
+		  	printf("\n太可惜了~你的答案是 %c ，正确答案是 %c ",p->input,p->right);
+		   } 
+          i=i+1;
+          printf("\n----------------------------------------------------------\n");
+          if(i==n)
+          	break; 
+        }while(p->next!=NULL);
+        printf("考试结束!\n");
+        printf("总题数：%d\n正确数：%d\n",n,score);
+        getch();
+        ;
+    }
+    else 
+	printf("题库中没有题目!\n");
+    printf("按任意键继续！\n");
+    getchar();
+}
+