有没有办法在 C++ 源代码中用空格编写大量数字以使其更具可读性? [英] Is there a way to write a large number in C++ source code with spaces to make it more readable?

问题描述

假设我有代码:

vector<int> temp = vector<int>(1 000 000 000);

以上不会编译，因为编译器会抱怨空格.是否可以指示 C++ 在编译时省略这些空格，或者以其他方式使数字更易于阅读?

The above will not compile as the compiler will complain about the spaces. Is it possible to indicate to C++ to ommit those spaces when compiling, or otherwise make the number easier to read?

推荐答案

试试数字分隔符:

int i = 1'000'000'000;

此功能是 自 C++14 引入的.它使用单引号 (') 作为数字分隔符.

This feature is introduced since C++14. It uses single quote (') as digit separator.

另见:

• 为什么没有为 C++14 数字分隔符选择空格字符?
• 泛化 C++2000 的重载(C++ 之父 4 月的笑话)

• Why was the space character not chosen for C++14 digit separators?
• Generalizing Overloading for C++2000 (April's joke by the father of C++ himself)

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