run_examination.c

比较原始的学校出题系统

#include<stdio.h>

struct examination
{
int acctNum;
int type;
int knowledge;
char content[100];
char answer[10];
};

int enterChoice(void);
void textFile(FILE *);
void updateRecord(FILE *);
void newRecord(FILE *);
void deleteRecord(FILE *);
void newBuilding(void);

main()
{
FILE * cfPtr;
int choice;

if((cfPtr=fopen("data.dat","r+")) == NULL)
{
 printf("File could not be opened. ");
 getch();
}
else
{
 while((choice=enterchoice())!=5)
 {
  swich(choice)
  {
   case 1: textFile(cfPtr);break;
   case 2: updateRecord(cfPtr);break;
   case 3: newRecord(cfPtr);break;
   case 4: deleteRecord(cfPtr);break;
  }
 }
}

fclose(cfPtr);
return 0;
}


void newBuilding(void)
{
 int i;
 int j = 0;
 FILE * cfPtr;
 if((cfPtr = fopen("newBuilding","w")) == NULL)
 {
  printf("file \"newBuilding\" could not be opened.");
  getch();
 }
 else
 {
  for(i=1;i<=100;i++)
  fwrite(&j,sizeof(int),1,cfPtr);
  fclose(cfPtr);
 }
 return 0;
}


void textFile(FILE *readPtr_data)
{
 int i;
 int acctNum1[100];
 int newbuilding = 0;
 int acctNum = 0;
 int type = 0;
 int knowledge = 0;
 char y_n;
 struct examination ex1;
 FILE * writePtr_content;
 FILE * writePtr_answer;
 FILE * readPtr_newbuilding;
 newBuilding();
 if((writePtr_content = fopen("content.dat","a+")) == NULL)
 {
  printf("file could not be opened .");return 1;
 }
  if((writePtr_answer = fopen("answer.dat","a+")) == NULL)
 {
  printf("file could not be opened .");return 1;
 }
  if((readPtr_newbuilding = fopen("newbuilding.dat","r+")) == NULL)
 {
  printf("file could not be opened .");return 1;
 }
mark1: printf("是否显示所有试题(Y/N)? ");
mark2: y_n = getch();
 printf("%c",y_n);
 if(y_n == 'y')
 {
  rewind(readPtr_data);
  printf("全部试题如下: \n");
  printf("题目号 试题内容 答案 类型 知识点 \n");
  while(!feof(readPtr_data))
  {
   fread(&ex1,sizeof(struct examination),1,readPtr_data);
   if(ex1.acctNum != 0)
    printf("%d%-3s%-3s%-3d%-3d \n",ex1.acctNum,ex1.content,ex1.answer,ex1.type,ex1.knowledge);
  }
  printf("是否再显示所有试题 ?");
  goto mark2;
 }
 else
 {
  if(y_n == 'n') goto mark3;
  else goto mark1;
 }
mark3:
 printf("please enter 题型 (1~3) ?");
 type = getch();
 printf("%d",type);
 while(type!=1||type!=2||type!=3)
 {
  printf("题型 输入有误,请重新输入:");
  type = getch();
  printf("%d",type);
 }
 printf("please enter 知识点 (1~15) ?");
 scanf("%d",&knowledge);
 while(knowledge<1||knowledge>15)
 {
  printf("知识点 输入有误,请重新输入:");
  scanf("%d",&knowledge);
 }
 printf("以下是所有与您输入的参数有关的试题 :");
 printf("题目号 试题内容 答案 类型 知识点 \n");
mark6:
 rewind(readPtr_data);//从这以下为显示信息
 rewind(readPtr_newbuilding);
 for(i = 0;i<100;i++) acctNum1[i] = 0; i = 0;//对试题编号数组初始化
 while(!feof(readPtr_data))
 {
  fread(%ex1,sizeof(struct examination),1,readPtr_data);
  if(ex1.acctNum!=0 && ex1.type == type && ex1.knowledge == knowledge)
  {
   fseek(readPtr_newbuilding,(ex1.acctNum-1)*sizeof(int),SEEK_SET);
   fread(&newbuilding,sizeof(int),1,readPtr_newbuilding);
   if(newbuilding != 0)
    break;
   else
   {
    printf("%d%-3s%-3s%-3d%-3d \n",ex1.acctNum,ex1.content,ex1.answer,ex1.type,ex1.knowledge);
	acctNum1[i] = ex1.acctNum;
	i++;
   }
  }
 }
 printf("请输入您想出的试题编号: ?");
mark5: 
 scanf("%d",&acctNum);
 while(acctNum<1||acctNum>100)
 {
  printf("您输入的编号不在题库范围内,请考虑好再输入: ?");
  scanf("%d",&acctNum);
 }
 for(i=0;i<100;i++)
 {
  if(acctNum1[i] == acctNum) goto mark4;
 }
 printf("您输入的编号不在上述结果中,请看清楚再输入: ?");
 goto mark5;
mark4: 
 fseek(readPtr_data,(acctNum - 1)*sizeof(struct examination),SEEK_SET);
 fread(&ex1,sizeof(struct examination),1,readPtr_data);
 fprintf(writePtr_content,"%d%-3s \n",ex1.acctNum,ex1.content);
 fprintf(writePtr_answer,"%-3s%-3d%-3d \n",ex1.answer,ex1.type,ex1.knowledge);
 fseek(readPtr_newbuilding,(ex1.acctNum-1)*sizeof(int),SEEK_SET);
 newbuilding = 1;
 fwrite(&newbuilding,sizeof(int),1,readPtr_newbuilding);
 printf("试题 %d 添加成功!",acctNum);
 printf("是否还出这种同题型,同只是点的试题?(Y/N) ");
mark7:
 y_n = getch();
 printf("%c",y_n);
 if(y_n = 'y') goto mark6;
 else
 {
  if(y_n = 'n')
  {
   printf("是否继续出题?(Y/N) ");
mark8:
   y_n = getch();
   printf("%c",y_n);
   if(y_n =='y') goto mark1;
   else
    if(y_n == 'n') 
	{
	 fclose(writePtr_content);
     fclose(writePtr_answer);
     fclose(readPtr_newbuilding);
	 return 0;
	}
	else goto mark8;
  }
 else goto mark7;
 }

}