c语言feof函数_使用示例的C语言中的feof（）函数

c语言feof函数

C语言中的feof()函数 (feof() function in C)

Prototype:

原型：

    int feof(FILE* filename);

Parameters:

参数：

    FILE *filename

Return type: int(0 or 1)

返回类型： int(0或1)

Use of function:

使用功能：

In C language when we are using a stream that links with a file, then how can we determine we come to the end of a file. To solve the problem we have to compare an integer value to the EOF value. Through the feof() function we determine whether EOF of a file has occurred or not. The prototype of this function is int feof(FILE* filename);

在C语言中，当我们使用与文件链接的流时，那么如何确定到文件末尾。为了解决该问题，我们必须将整数值与EOF值进行比较。通过feof()函数，我们确定文件的EOF是否发生。该函数的原型是int feof(FILE * filename);

It returns the value zero when end of the file has not occurred, otherwise it returns 1.

未出现文件结尾时，它返回零值；否则返回1。

feof()在C中的示例 (feof() example in C)

#include<stdio.h>
#include<stdlib.h>
int main()
{
FILE *f;
char str[100];
//Check the existence of that file
if((f=fopen("includehelp.txt","r"))==NULL){
printf("Cannot open the file...");
//if not exist program is terminated
exit(1);
}
printf("File content is--\n");
//print the strings until EOF is encountered
while(!feof(f)){
fgets(str,100,f);
//print the string
printf("%s",str);
}
//close the opened file
fclose(f);
return 0;
}

Output

输出量