a+模式打开文件，不能追加的问题，帮忙看

[kostion]

直接上代码

FILE *file = fopen("TempRecord.txt","w");

	FILE *logfile = fopen("CountHour.txt","a+");

	if(file == NULL)
	{
		strcat(buf,"Open temporary file error ! \r\n");

		fprintf(logfile,"%s",buf);

		return -1;
	}
	if(logfile == NULL)
	{
		strcat(buf,"Open log file error ! \r\n");

		fprintf(logfile,"%s",buf);

		return -1;
	}
	strcat(buf,"tashan will stop,begin write last number into logfile ! \r\n");

	fprintf(logfile,"%s",buf);

	fgets(num,10,file);

	sscanf(num,"%d",&curentNum);

	curentNum = g_nBroadNum;

	fprintf(file,"%d",curentNum);

	fclose(logfile);

	fclose(file);

系统free bsd 6.2，程序不重新启动，循环可以追加，但是当程序重启的时候，文件就被清空了，为什么

[猫已经找不回了]

这么奇怪?ab+试下.

[liliangbao]

if(logfile == NULL)
    {
        strcat(buf,"Open log file error ! \r\n");

        fprintf(logfile,"%s",buf);//文件不能打开为什么还望文件中写数据~

        return -1;
    }

[kostion]

[Quote=引用 2 楼 liliangbao 的回复:]
C/C++ codeif(logfile==NULL)
{
strcat(buf,"Open log file error ! \r\n");

fprintf(logfile,"%s",buf);//文件不能打开为什么还望文件中写数据~return-1;
}
[/Quote]

这里写错了，我是想向另一个里面写

[kostion]

file = fopen("TempRecord.txt","r");
	
	logfile = fopen("CountHour.txt","a+");

	if((file == NULL) || (logfile == NULL))
	{
		return -1;
	}
	strcat(buf,"tashan is start,begin read logfile ! \r\n");

	fprintf(logfile,"%s",buf);
	
	fgets(num,10,file);

	sscanf(num,"%d",&curentNum);

	g_nBroadNum = curentNum;

	fprintf(logfile,"Broad date current is %d\r\n",curentNum);

	fclose(logfile);

	fclose(file);

	return 0;

刚贴错了，是这段

[piginthetree]

楼主把字符串最后的\r去掉试试, \\r\n是windows的换行符号, unix里面都不这样用的哈

[kostion]

[Quote=引用 5 楼 piginthetree 的回复:]
楼主把字符串最后的\r去掉试试, \\r\n是windows的换行符号, unix里面都不这样用的哈
[/Quote]

跟那个没有关系啊，因为产生的日志文件是给客户拿到windows上看

[luobinshan]

看不懂

建议看看每个返回值是否有问题

fprintf(logfile,"%s",buf);

    fgets(num,10,file);

    sscanf(num,"%d",&curentNum);

    curentNum = g_nBroadNum;

    fprintf(file,"%d",curentNum);