单机考试系统源代码C.doc

单机考试系统源代码　 2010年04月08日 星期四 22:00　 设计一个单选题考试系统，该系统能随机从题库中抽取n项单选题供用户答题，用户　　　 答完后系统能自动判定对错，给出正确比例。功能要求及说明：（1）用文件保存试题库。（每个试题包括题干、4个备选答案、标准答案）；（2）试题录入：可随时增加试题到试题库中；（3）试题抽取：每次从试题库中可以随机抽出N道题（N由键盘输入）；（4）答题：用户可实现输入自己的答案（5）自动判卷：系统可根据用户答案与标准答案的对比实现判卷并给出成绩。#include stdio.h#include stdlib.h#include conio.h#include time.hchar suject[1000];char answers[100];char right;int total;/*获取试题*/int getTest(){??? int i,j;??? int r;??? int flag=1;??? int count;??? int rightN;??? char answer;??? char YorN;??? FILE *fp;??? srand(time(00));??? printf(________________________________________________\n);??? if((fp=fopen(Test.txt,r))== NULL || total == 0)??? {??????? if((fp=fopen(E:\\Test.txt,r))!= NULL)??????????? fclose(fp);??????? printf(\nsorry\n暂无任何试题);??????? printf(\n你可以先录入试题！);??????? printf(\n按任意键返回\n);??????? flag=0;??????? getch();??? }??? else??? {??? loop:??????? rightN=0;??????? printf(\n(注：共有%d题目,个数要 = 题数),total);??????? printf(\n\n试题测试的个数：);??????? scanf(%d,count);??????? for(i=0; icount count=total; i++)??????? {??????????? r=rand()%total;??????????? fseek(fp,0,0);??????????? for(j=0; j=r; j++)??????????? {??????????????? //获取题目??????????????? fgets(suject,1000,fp);??????????????? //获取备选的??????????????? fgets(answers,100,fp);??????????????? //获取答案??????????????? fgets(right,3,fp);??????????? }??????????? printf(\n\n%d.,i+1);??????????? puts(suject);??????????? puts(answers);??????????? printf(\n\n答案：);??????????? getchar();??????????? answer=getchar();??????????? if(answer==right)rightN++;??????????? else if(answer==(right+32))rightN++;??????????? else if(answer==(right-32))??????????????? rightN++;??????????? //printf(%c %c\n,answer,right);??????? }??????? getchar();??????? printf(________________________________________________\n);??????? printf(\n回答个数\t正确个数\t最后得分\n);??????? printf(%d\t\t,count);??????? printf(%d,rightN);??????? printf(\t\t%.2f\n,rightN*1.0/count*100.0);??????? printf(\n是否还要继续答题？ Y/N: )