C语言-获取文件长度[原创]

int len = 0;
FILE *fp = fopen(filename, "r");
if(fp != NULL)//fp==NULL时返回该文件不能打开
{
fseek(fp, 0, SEEK_END);
len = ftell(fp);
printf("len=%d bytes\n",len);
fclose(fp);

}

return  len;