如何正确地将输出组织成列？ [英] How do I correctly organize output into columns?

问题描述

我想到的第一件事是做一堆\t的，但是如果任何单词比任何其他单词长出几个字符，这将导致单词不对齐。

The first thing that comes to my mind is to do a bunch of \t's, but that would cause words to be misaligned if any word is longer than any other word by a few characters.

例如，我想要一些类似的东西：

For example, I would like to have something like:

Name    Last Name            Middle initial
Bob     Jones                M
Joe     ReallyLongLastName   T

而是仅包含\t 在我的cout语句中，我只能设法获得

Instead, by including only "\t"'s in my cout statement I can only manage to get

Name    Last Name            Middle initial
Bob     Jones                M
Joe     ReallyLongLastName                T

或

Name    Last Name            Middle initial
Bob     Jones    M
Joe     ReallyLongLastName   T

我还需要做什么？

编辑：所以我应该首先计算每一列的最大宽度，然后相应地添加填充空间。但是如何，以及用什么功能，我可以这样做吗？

So I get that I should first count the maximum width of each column I want displayed, and then adding padding spaces accordingly. But how, and with what functions, can I go about doing this? Should I simply count the number of chars in a string and then go from there?

推荐答案

使用< iomanip>的//en.cppreference.com/w/cpp/io/manip/setw> std :: setw ;

例如

using std::cout;
using std::setw;

cout << setw(10) << "This" <<
        setw(10) << "is" <<
        setw(10) << "a" <<
        setw(10) << "test" << '\n';

输出：

      This        is         a      test

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