if(!feof(filePointer))是否必要？

zzyubuntu · #1

代码：全选

int main()
{
   FILE *filePointer;
   int tempChar;
   filePointer = fopen("DI.txt","r");
   while (!feof(filePointer))
   {
      tempChar = fgetc(filePointer);
      if(!feof(filePointer))   //能否能去掉
      {
         putchar(tempChar);
      }
   }
   fclose(filePointer);
   return 0;
}

laborer · #2

不可以，可以改成这样的结构

代码：全选

int main() 
{ 
   FILE *filePointer; 
   int tempChar; 
   filePointer = fopen("DI.txt","r"); 
   tempChar = fgetc(filePointer); 
   while (!feof(filePointer)) 
   { 
      putchar(tempChar); 
      tempChar = fgetc(filePointer); 
   } 
   fclose(filePointer); 
   return 0; 
}

zzyubuntu · #3

谢谢了！

laborer · #4

也可以

代码：全选

int main() 
{ 
   FILE *filePointer; 
   int tempChar; 
   filePointer = fopen("DI.txt","r"); 
   while ((tempChar = fgetc(filePointer)) != EOF) 
   { 
      putchar(tempChar); 
   } 
   fclose(filePointer); 
   return 0; 
}

zzyubuntu · #5

比较喜欢前一个

arthur · #6

支持4楼的写法，逻辑比较清晰。