如何在执行方程时在 C++ 中开始换行
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How to start a newline in C++ while doing equations
提问by Timothy Rebidue
Im reading through "The C++ Programming Language" and my current assignment is to make a program that takes two variables and determines the smallest, largest, sum, difference, product, and ratio of the values.
我正在阅读“C++ 编程语言”，我当前的任务是编写一个程序，该程序采用两个变量并确定这些值的最小、最大、总和、差、乘积和比率。
Problem is i can't start a newline. "\n" doesn't work because i have variables after the quote. And "<< endl <<" only works for the first line. I googled the hell out of this problem and im coming up short.
问题是我无法开始换行。"\n" 不起作用，因为我在引号后有变量。而 "<< endl <<" 仅适用于第一行。我在谷歌上搜索了这个问题，结果很短。
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
using namespace std;
inline void keep_window_open() {char ch;cin>>ch;}
int main()
{
int a;
int b;
cout<<"Enter value one\n";
cin>>a;
cout<<"Enter value two\n";
cin>>b;
(a>b); cout<< a << " Is greater than " << b;
(a<b); cout<< a << " Is less than " << b;
keep_window_open();
return 0;
}
回答by emartel
You are looking for std::endl, but your code won't work as you expect.
您正在寻找std::endl，但您的代码无法按预期工作。
(a>b); cout<< a << " Is greater than " << b;
(a<b); cout<< a << " Is less than " << b;
This is not a condition, you need to rewrite it in terms of
这不是条件，您需要根据以下条件重写它
if(a>b) cout<< a << " Is greater than " << b << endl;
if(a<b) cout<< a << " Is less than " << b << endl;
You can also send the character \nto create a new line, I used endlas I thought that's what you were looking for. See this threadon what could be issues with endl.
你也可以发送角色\n来创建一个新行，我用过，endl因为我认为这就是你要找的。请参阅此线程，了解endl.
The alternative is written as
替代写为
if(a>b) cout<< a << " Is greater than " << b << "\n";
if(a<b) cout<< a << " Is less than " << b << "\n";
There are a few "special characters" like that, \nbeing new line, \rbeing carriage return, \tbeing tab, etc... useful stuff to know if you're starting.
有一些像这样的“特殊字符”，\n换行符，\r回车符，\t制表符等...有用的东西，知道你是否开始。
回答by dasblinkenlight
You can output std::endlto the stream to move to the next line, like this:
您可以输出std::endl到流以移动到下一行，如下所示：
cout<< a << " Is greater than " << b << endl;
