fscanf多行[c ++] [英] fscanf multiple lines [c++]

问题描述

我正在阅读包含多行数据的文件，例如：

 ：100093000202C4C0E0E57FB40005D0E0020C03B463 
：1000A3000105D0E0022803B40205D0E0027C03027C 
：1000B30002E3C0E0E57FB40005D0E0020C0BB4011D 
  

我正在逐字节读取值并将它们存储在数组中。

  fscanf_s（in_file，％c，& sc）; // start code 
 fscanf_s（in_file，％2X，& iByte_Count）; // byte count 
 fscanf_s（in_file，％4X，& iAddr）; // 2 byte address 
 fscanf_s（in_file，％2X，& iRec_Type）; // record type 
 
 for（int i = 0; i< iByte_Count; i ++）
 {
 fscanf_s（in_file，％2X，& iData [i] ; 
 iArray [（iMaskedAddr / 16）] [iMaskedNumMove + 3 + i] = iData [i]; 
} 
 fscanf_s（in_file，％2X，& iCkS）; 
  

这很好，除非我到第一行结束。我需要这个重复，直到我到文件的末尾，但当我把它放在一个循环中它发生了。

我可以强制位置到下一行的开始吗？

我知道我可以使用流和所有的，但我正在处理这种方法。

感谢您的帮助

解决方案我的建议是转储 fscanf_s 并使用 fgets 或 std :: getline 。

也就是说，你的问题是处理换行符，下一个记录开头是'：'。

一种方法是使用 fscanf_s（％c），直到读取'：'字符文件结束：

  char start_of_record; 
 do 
 {
 fscanf_s（infile，％c，& start_of_record）; 
} while（！feof（infile）&&（start_of_record！='：'））; 
 //现在处理标题.... 
  

OP正在读取的数据是用于传输二进制数据的标准格式，通常用于下载到闪存和EPROM中。

I am reading in a file with multiple lines of data like this:

:100093000202C4C0E0E57FB40005D0E0020C03B463
:1000A3000105D0E0022803B40205D0E0027C03027C
:1000B30002E3C0E0E57FB40005D0E0020C0BB4011D

I am reading in values byte by byte and storing them in an array.

    fscanf_s(in_file,"%c", &sc);  // start code
    fscanf_s(in_file,"%2X", &iByte_Count); // byte count
    fscanf_s(in_file,"%4X", &iAddr);    // 2 byte address 
    fscanf_s(in_file,"%2X", &iRec_Type);  // record type 

    for(int i=0; i<iByte_Count; i++)
    {
        fscanf_s(in_file,"%2X", &iData[i]);
        iArray[(iMaskedAddr/16)][iMaskedNumMove+3+i]=iData[i];
    }
    fscanf_s(in_file,"%2X", &iCkS);

This is working great except when I get to the end of the first line. I need this to repeat until I get to the end of the file but when I put this in a loop it craps out.
Can I force the position to the begining of the next line?
I know I can use a stream and all that but I am dealing with this method.
Thanks for the help

解决方案

My suggestion is to dump fscanf_s and use either fgets or std::getline.

That said, your issue is handling the newlines, and the next beginning of record token, the ':'.

One method is to use fscanf_s("%c") until the ':' character is read or the end of file is reached:

char start_of_record;
do
{
  fscanf_s(infile, "%c", &start_of_record);
} while (!feof(infile) && (start_of_record != ':'));
// Now process the header....

The data the OP is reading is a standard format for transmitting binary data, usually for downloading into Flash Memories and EPROMs.

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