本文介绍了如何使用fstream中的fstream从文件中读取十六进制值?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如标题所示,如何使用 fstream

As the title says, how do you read hex values using fstream?

(假设文件中有FF。)

i have this code: (let's say we have "FF" in the file.)

fstream infile;
infile.open(filename, fstream::in|fstream::out|fstream::app);

int a;
infile >> std::hex;
infile >> a;
cout << hex << a;

但这不会给我任何输出,而不是 ff 。我知道有一个 fscanf(fp,%x,val)但我很好奇有没有任何方法这样做使用流库。

but this does not give me any output instead of ff. I know there is a fscanf(fp, "%x", val) but I am curious is there any way to do this using stream library.

UPDATE

我的代码一直运行正常,原来我的错误是我不能读取FFF并将其放入变量a,b,c中

My code was right all along, it turns out my error was I couldn't read "FFF" and put it in variable a,b,c like this

while (infile >> hex >> a >> b >> c)
  {
    cout << hex << a << b << c << "\n";
  }

有人可以帮我吗?我必须分离每个HEX值我想用空间阅读吗?
因为 infile>> hex>> setw(1)不起作用。

Can somebody help me with this? do I have to separate every HEX values i want to read with space?because infile >> hex >> setw(1) doesn't work..

推荐答案

p>

You can use the hex modifier

int n;
cin >> hex >> n;

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05-28 01:07
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