读文件时出错。大家帮忙修改下吧
在写入考试成绩后，重新从本地读取出错。不知道哪里错了。
程序代码：#include "stdio.h"
#include "time.h"
#include "stdlib.h"
void main()
{ int caozuo,weishu=0,tishu=0,zongfen=0,suanfa=0,i,shu1,shu2,a,hd,da,ii,fp;
int plus(int tishu,int a);
int minus(int tishu,int a);
int multiply(int tishu,int a);
int devide(int tishu,int a);
int random(int tishu,int a);
void ceyan(int tishu,int a,int zongfen);
void chakan();
srand((unsigned)time(NULL));
loop:
printf("\n\n\t\t☆★☆★☆★☆★☆★☆★☆★☆★☆★\n");
printf("\t\t★ ☆\n");
printf("\t\t☆ 算术练习 ★\n");
printf("\t\t★ 1 练习 ☆\n");
printf("\t\t☆ 2 测验 ★\n");
printf("\t\t★ 3 设置 ☆\n");
printf("\t\t☆ 4 查看测验成绩 ★\n");
printf("\t\t★ 0 退出 ☆\n");
printf("\t\t☆ ★\n");
printf("\t\t★☆★☆★☆★☆★☆★☆★☆★☆★☆") ;
printf("\n\n请输入您要进行的操作：");
scanf("%d",&caozuo);
if((caozuo!=1)&&(caozuo!=2)&&(caozuo!=3)&&(caozuo!=4)&&(caozuo!=0))
{
printf("\n提示：\n输入有误，请重新操作\n\n\n");
goto loop;
}
system("cls");
switch(caozuo)
{
case 1 :
{
if(tishu==0)
{
system("cls");
printf("\n请先设置再进入练习模式!\n按任意键返回主菜单。");
getchar();
getchar();
system("cls");
goto loop;
}
switch(suanfa)
{
case 1:ii=plus(tishu,a);break;
case 2:ii=minus(tishu,a);break;
case 3:ii=multiply(tishu,a);break;
case 4:ii=devide(tishu,a);break;
case 5:ii=random(tishu,a);break;
}
printf("总答题数：%d\n答对%d题\n正确率%.2f%%\n得分：%.1f
",tishu,ii,ii*100.0/tishu,zongfen*1.0/tishu*ii);
getchar();}
break;
case 2:
if(tishu==0)
{
system("cls");
printf("\n请先设置再进行测验模式!\n按任意键返回主菜单。");
getchar();
getchar();
system("cls");
goto loop;
}
else
ceyan(tishu,a,zongfen);
break;
case 3:
printf("设置：\n");
chongf1:
printf("\n数据位数(1~3)：\n");
scanf("%d",&weishu);
if((weishu<1)||(weishu>3))
{
printf("超出数据范围!\n");
goto chongf1;
}
switch(weishu)
{
case 1:a=9;break;
case 2:a=99;break;
case 3:a=999;break;
default:;
}
chongf2:
printf("\n测试模式题数：\n");
scanf("%d",&tishu);
if(tishu<0)
{
printf("题数输入错误!\n");
goto chongf2;
}
chongf3:
printf("\n测试模式总分：\n");
scanf("%d",&zongfen);
if(zongfen<0)
{
printf("总分输入错误!\n");
goto chongf3;
}
chongfu4:
printf("\n练习模式运算符为：1.加法 2.减法 3.乘法 4.除法 5.随机\n");
printf("（测验模式运算符默认随机）\n");
scanf("%d",&suanfa);
if(suanfa<1||suanfa>5)
{
printf("运算输入错误");
goto chongfu4;
}
printf("========================\n");
printf("数据位数：%d\n",weishu);
printf("总题数:%d\n",tishu);
printf("总分：%d\n",zongfen);
switch(suanfa)
{
case 1:printf("运算符号：+");break;
case 2:printf("运算符号：-");break;
case 3:printf("运算符号：*");break;
case 4:printf("运算符号：/");break;
case 5:printf("运算符号：随机");break;
}
getchar();
getchar();
system("cls");
goto loop;
case 4 :chakan();
case 0 :exit(0);
}
}
int plus(int tishu,int a)
{ int hd,da,shu1,shu2,i,ii=0;
for(i=1;i<=tishu;i++)
{
shu1=rand()%a;
shu2=rand()%a;
da=shu1+shu2;
printf("%d) %d+%d=",i,shu1,shu2);
scanf("%d",&hd);
if(hd==da)
{
printf("√\n\n");
ii++;
}
else printf("×正确答案：%d\n\n",da);
}
return (ii);
}
int minus(int tishu,int a)
{ int hd,da,shu1,shu2,i,ii=0;
for(i=1;i<=tishu;i++)
{shu1=rand()%a;
shu2=rand()%a;
da=shu1-shu2;
printf("%d) %d-%d=",i,shu1,shu2);
scanf("%d",&hd);
if(hd==da)
{
printf("√\n\n");
ii++;
}
else printf("×正确答案：%d\n\n",da);}
return (ii);
}
int multiply(int tishu,int a)
{ int hd,da,shu1,shu2,i,ii=0;
for(i=1;i<=tishu;i++)
{
shu1=rand()%a;
shu2=rand()%a;
da=shu1*shu2;
printf("%d) %d*%d=",i,shu1,shu2);
scanf("%d",&hd);
if(hd==da)
{
printf("√\n\n");
ii++;
}
else printf("×正确答案：%d\n\n",da);}
return (ii);
}
int devide(int tishu,int a)
{ int shu1,shu2,i,ii=0;
int check(int A,int B);
float hd,da;
for(i=1;i<=tishu;i++)
{loop:
shu1=rand()%a;
shu2=rand()%a;
if(check(shu1,shu2)==-1||shu2==0)
goto loop;
da=shu1*1.0/shu2;
printf("%d) %d/%d=",i,shu1,shu2);
scanf("%f",&hd);
if(hd==da)
{
printf("√\n\n");
ii++;
}
else printf("×正确答案：%d\n\n",da);}
return (ii);
}
int check(int A,int B)
{ float temp;
temp=(float)A/(float)B;
if(temp*B==(float)A){
return 1;
}
return -1;
}
int random(int tishu,int a)
{ int check(int A,int B);
int hd,da,shu1,shu2,i,ii=0,b;
for(i=1;i<=tishu;i++)
{
b=rand()%4;
loop:
shu1=rand()%a;
shu2=rand()%a;
switch(b)
{
case 1:
{da=shu1+shu2;
printf("%d) %d+%d=",i,shu1,shu2);
scanf("%d",&hd);
if(hd==da)
{printf("√\n\n");
ii++;}
else printf("× 正确答案%d\n\n",da);}
break;
case 2:
{da=shu1-shu2;
printf("%d) %d-%d=",i,shu1,shu2);
scanf("%d",&hd);
if(hd==da)
printf("√\n\n");
else printf("× 正确答案%d\n\n",da);}
break;
case 3:
{da=shu1*shu2;
printf("%d) %d*%d=",i,shu1,shu2);
scanf("%d",&hd);
if(hd==da)
printf("√\n\n");
else printf("× 正确答案%d\n\n",da);}
break;
case 4:
{if(check(shu1,shu2)==-1||shu2==0)
goto loop;
da=shu1*1.0/shu2;
printf("%d) %d/%d=",i,shu1,shu2);
scanf("%f",&hd);
if(hd==da)
{
printf("√\n\n");
ii++;
}
else printf("×正确答案：%d\n\n",da);}
}
}
return(ii);
}
void ceyan(int tishu,int a,int zongfen)
{ struct cysj
{
char name[10];
int daan[tishu];
int fs;
}cysj;
int hd,da,shu1,shu2,i,ii=0,b;
int check(int A, int B);
printf("测验:\n");
printf("姓名：");
scanf("%s",&cysj.name);
for(i=1;i<=tishu;i++)
{
b=rand()%3+1;
loop1:
shu1=rand()%a;
shu2=rand()%a;
switch(b)
{
case 1:
{da=shu1+shu2;
printf("%d) %d+%d=",i,shu1,shu2);
scanf("%d",&hd);
cysj.daan[i-1]=da;
if(hd==da)
ii++;
}
break;
case 2:
{da=shu1-shu2;
printf("%d) %d-%d=",i,shu1,shu2);
scanf("%d",&hd);
cysj.daan[i-1]=da;
if(hd==da)
ii++;
}
break;
case 3:
{da=shu1*shu2;
printf("%d) %d*%d=",i,shu1,shu2);
scanf("%d",&hd);
cysj.daan[i-1]=da;
if(hd==da)
ii++;
}
break;
case 4:
if(check(shu1,shu2)==-1||shu2==0)
goto loop1;
da=shu1*1.0/shu2;
printf("%d) %d/%d=",i,shu1,shu2);
scanf("%f",&hd);
cysj.daan[i-1]=da;
if(hd==da)
ii++;
break;
}
}
printf("☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★\n");
printf("\t\t测试结束\n");
printf("\t按任意键查看本次测试成绩与答案\n");
printf("☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★\n");
getchar();
getchar();
printf("总题数:%d\n正确题数:%d\n得分：%.1f\n",tishu,ii,zongfen*1.0/tishu*ii);
printf("答案：\n");
for(i=0;i<tishu;i++)
printf("%d\n",cysj.daan[i]);
printf("可在主菜单查看功能中查看本次测验成绩");
getchar();
FILE *fp;
fp=fopen("D:\\测验结果.dat","w+");
fwrite(cysj.name,sizeof(char),1,fp);
fprintf(fp,"\n答案：\n");
fwrite(cysj.daan,sizeof(int),tishu,fp);
fprintf(fp,"\n总题数:%d\n",tishu);
fprintf(fp,"\n答对%d题\n",ii);
fprintf(fp,"\n得分:%.1f\n",zongfen*1.0/tishu*ii);
fclose(fp);
}
void chakan()
{ int ch=0;
FILE *fp;
fp=fopen("D:\\测验结果.dat","r");
if(fp==NULL)
{
printf("\ncannot open the file");
exit(1);
}
else
{
while((ch=fgetc(fp))!=EOF)
{
putchar(ch);
}
}
fclose(fp);
}
