将 char 乘以整数 (c++) [英] Multiply char by integer (c++)

问题描述

char 可以乘 int 吗?

Is it possible to multiply a char by an int?

例如，我正在尝试制作一个图表，每次出现一个数字时都带有 *.

For example, I am trying to make a graph, with *'s for each time a number occurs.

类似的东西，但这不起作用

So something like, but this doesn't work

char star = "*";
int num = 7;

cout << star * num //to output 7 stars

推荐答案

我不会称该操作为乘法"，这只是令人困惑.串联是一个更好的词.

I wouldn't call that operation "multiplication", that's just confusing. Concatenation is a better word.

无论如何，名为 std::string 的 C++ 标准字符串类有一个非常适合您的构造函数.

In any case, the C++ standard string class, named std::string, has a constructor that's perfect for you.

string ( size_t n, char c );

内容被初始化为由字符c、n次重复形成的字符串.

Content is initialized as a string formed by a repetition of character c, n times.

所以你可以这样:

char star = '*';  
int num = 7;
std::cout << std::string(num, star) << std::endl;  

确保包含相关的标题，<string>.

Make sure to include the relevant header, <string>.

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