关天fseek(fp_Write, 0L, SEEK_END);指向文件未尾应用

fu2521

关天fseek(fp_Write, 0L, SEEK_END);指向文件未尾应用 [复制链接]

关天fseek(fp_Write, 0L, SEEK_END);指向文件未尾应用
bool SaveToBookMark3(char* pBookMarkTitle, char* pUrl )
{
        //char FullPath[256] = {"\\Windows\\收藏夹\\"};
        char FullPath[256] = {"\\Windows\\Opera9\\Opera6.adr"};
        //strcat((char*)FullPath , pBookMarkTitle);

        char BookmarkPrex[32] = {"[InternetShortcut]"};

        char CReturn[4] = {"\r\n"};
        char CUrlHeader[8] = {"URL="};

        FILE *fp_Write;
        fp_Write =fopen(FullPath, "w+");
        if (!fp_Write)
        {
                return false;
        }

        fseek(fp_Write, 0L, SEEK_END);
        ////line 1:
        fwrite(BookmarkPrex, sizeof(char), strlen(BookmarkPrex), fp_Write);
        fwrite(CReturn, sizeof(char), strlen(CReturn), fp_Write);

        //line 2:
        fwrite(CUrlHeader, sizeof(char), strlen(CUrlHeader), fp_Write);
        fwrite(pUrl, sizeof(char), strlen(pUrl), fp_Write);

        //line 3:
        fwrite(CReturn, sizeof(char), strlen(CReturn), fp_Write);
        fclose(fp_Write);

        return true;
}

这样写为什么每次都把以前的内容覆盖了?fseek(fp_Write, 0L, SEEK_END);不能让指针指向文件未尾吗?

airchensu

不知道你写完fwrite指针会不会移动要不你在每次fwrite之后再加一句fseek

iamljz

该为：

1. FILE *fp_Write;
   
2. fp_Write =fopen(FullPath, "a+");
   
3. if (!fp_Write)
   
4. {
   
5. return false;
   
6. }

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