Superscript in C++ console output

问题

I'd like to have my program output "cm²" (cm squared).

How do make a superscript 2?

回答1:

As Zan said, it depends what character encoding your standard output supports. If it supports Unicode , you can use the encoding for ²(U+00B2). If it supports the same Unicode encoding for source files and standard output, you can just embed it in the file. For example, my GNU/Linux system uses UTF-8 for both, so this works fine:

#include <iostream>

int main()
{
    std::cout << "cm²" << std::endl;
}

回答2:

This is not something C++ can do on its own.

You would need to use a specific feature of your console system.

I am not aware of any consoles or terminals that implement super-script. I might be wrong though.

回答3:

I was trying to accomplish this task for the purpose of making a quadratic equation solver. Writing ax² inside a cout << by holding ALT while typing 253 displayed properly in the source code only, BUT NOT in the console. When running the program, it appeared as a light colored rectangle instead of a superscript 2.

A simple solution to this seems to be casting the integer 253 as a char, like this... (char)253.

Because our professor discourages us from using 'magic numbers', I declared it as a constant variable... const int superScriptTwo = 253; //ascii value of super script two.

Then, where I wanted the superscript 2 to appear in the console, I cast my variable as a char like this... cout << "f(x) = ax" << (char)superScriptTwo << " + bx + c"; and it displayed perfectly.

Perhaps it's even easier just to create it as a char to begin with, and not worry about casting it. This code will also print a super script 2 to the console when compiled and run in VS2013 on my Lenovo running Windows 7...

char ssTwo = 253;
cout << ssTwo << endl;

I hope someone will find this useful. This is my first post, ever, so I do apologize in advance if I accidentally violated any Stack Overflow protocols for answering a question posted 5+ years ago. Any such occurrence was not intentional.

回答4:

Yes, I agree with Zan.

Basic C++ does not have any inbuilt functionality to print superscripts or subscripts. You need to use any additional UI library.

回答5:

For super scripting or sub scripting you need to use ascii value of the letter or number.

Eg: Super scripting 2 for x² we need to get the ascii value of super script of 2 (search in google for that) ie - 253. For typing ascii character you have to do alt + 253 here, you can write a any number, but its 253 in this case.

Eg:-cout<<"x²";

So, now it should display x² on the black screen.

回答6:

Why don't you try ASCII?
Declare a character and give it an ASCII value of 253 and then print the character.
So your code should go like this;

char ch = 253;
cout<<"cm"<<ch;

This will definitely print cm².

来源：https://stackoverflow.com/questions/4038377/superscript-in-c-console-output

标签

c++

superscript