如何在此输出中的每四个字符之间放置一个空格? [英] How do I put a space in between every four characters in this output?

问题描述

我正在编写一个程序，其中必须显示各种数据类型的二进制表示形式.我需要二进制输出每四个数字后有一个空格.例如:

I am writing a program where I have to display binary representations of various data types. I need the binary output to have a space after every four numbers. For instance:

0011 1111 1000 1110 1011 1000 0101 0010

下面是我用来显示二进制代码的函数示例.用空格格式化输出的最佳方法是什么?

Below is sample of a function I am using to display the binary code. What is the best way to format the output with the spaces?

void printChar(char testChar)
{
    unsigned char mask = pow(2, ((sizeof(char) * 8) - 1));

    cout << "The binary representation of " << testChar << " is ";
    for (int count = 7; count >= 0; count--)
    {
        if ((testChar & mask) != 0)
        {
            cout << "1";
        }
        else
        {
            cout << "0";
        }
        mask = (mask >> 1);
    }
    cout << endl;
}

推荐答案

您已经有了一个计数器，因此您可以使用它来确定正在使用哪个字符.例如:

You already have a counter going, so you can just use that to determine which character you're on. For example:

if(count == 3){

    cout << " ";
}

只需在if-else语句之前添加此if.这样，一旦您输出了4个字符，count将为3，因此您知道必须输出一个空格.

Just add this if before your if-else statement. That way, once you have outputted 4 characters, count will be 3, so you know you have to output a space.

注意:这是假设您一次只能输出8个字符，如代码所示.

Note: this is assuming you're only ever outputting 8 characters at a time, as your code suggests.

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