#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<windows.h>

int main()
{   
   FILE   *fp;
   char   ch,select[100];
   char   typed_text[500];
   char   str[100];
   int    totallength,typedlength;
   int    correctnum=0;
   int    i=0,n=0,j=0;
   char   number;
   long time1,  time2;
printf("************************************\n");
printf("*  welcome to words typing system  *\n");
printf("*      choose 1~5                  *\n");
printf("************************************\n");

printf("************************************\n");
printf("Please input the order number of paper\n");
scanf("%c", &number);
switch(number)
{
   case'1':      strcpy(select, "E:\\document\\5_1.txt");break;
   case'2':      strcpy(select, "E:\\document\\5_2.txt");break;
   case'3':      strcpy(select, "E:\\document\\5_3.txt");break;
   case'4':      strcpy(select, "E:\\document\\5_4.txt");break;
   case'5':      strcpy(select, "E:\\document\\5_5.txt");break;
   default:      printf("error option\n");break;
}


fp=fopen(select,"r+");
if(fp==NULL)
{printf("open error\n");exit(1);}


while((str[i]=fgetc(fp))!=EOF)
{ putchar(str[i]);
  i++;
}
printf("\n");
n=i;

printf("now start our game!\n");

time1=GetTickCount();


gets(typed_text);
for(j=0;j<n;j++)
{if(typed_text[j]==str[j])
 correctnum++;
}


time2=GetTickCount();
totallength=strlen(str);
typedlength=strlen(typed_text);



printf("Your accuracy is %.2f%%, and your speed is %d per minute!\n",correctnum*100/totallength,
(typedlength*1000*60)/(time2-time1));

printf("test\n");
return 0;
}

就是从文件中读出字符放入数组，用户输入字符放入数组，计算打字速度和正确率，可是执行到最后系统提示错误了tc停止工作，我不知道哪里出问题了？帮我看看好吗？