如何在C中打印引号?

In an interview I was asked

在一次采访中，有人问我

Print a quotation mark using the printf() function

使用printf()函数打印一个引号

I was overwhelmed. Even in their office there was a computer and they told me to try it. I tried like this:

我是不知所措。甚至在他们的办公室里也有一台电脑，他们叫我去试试。我试着像这样:

void main()
{
    printf("Printing quotation mark " ");
}

but as I suspected it doesn't compile. When the compiler gets the first " it thinks it is the end of string, which is not. So how can I achieve this?

但正如我所怀疑的那样，它并不编译。当编译器得到第一个“它认为它是字符串的结束，而不是。那么我该如何做到这一点呢?

9 个解决方案

#1

Try this:

试试这个:

#include <stdio.h>

int main()
{
  printf("Printing quotation mark \" ");
}

#2

Without a backslash, special characters have a natural special meaning. With a backslash they print as they appear.

没有反斜杠，特殊字符有自然的特殊含义。使用反斜杠，它们会在出现时打印出来。

\   -   escape the next character
"   -   start or end of string
’   -   start or end a character constant
%   -   start a format specification
\\  -   print a backslash
\"  -   print a double quote
\’  -   print a single quote
%%  -   print a percent sign

The statement

该声明

printf("  \"  ");

will print you the quotes. You can also print these special characters \a, \b, \f, \n, \r, \t and \v with a (slash) preceeding it.

将打印你的报价。你也可以打印这些特殊的字符a， \b， \f， \n， \r， \t和\v，在它之前加上(斜杠)。

#3

You have to escape the quotationmark:

你得避开引号:

printf("\"");

#4

Besides escaping the character, you can also use the format %c, and use the character literal for a quotation mark.

除了转义字符之外，还可以使用格式%c，并将字符文字用作引号。

printf("And I quote, %cThis is a quote.%c\n", '"', '"');

#5

In C programming language, \ is used to print some of the special characters which has sepcial meaning in C. Those special characters are listed below

在C语言中，\用来打印一些在C语言中有特殊意义的特殊字符

\\ - Backslash
\' - Single Quotation Mark
\" - Double Quatation Mark
\n - New line
\r - Carriage Return
\t - Horizontal Tab
\b - Backspace
\f - Formfeed
\a - Bell(beep) sound

#6

You have to use escaping of characters. It's a solution of this chicken-and-egg problem: how do I write a ", if I need it to terminate a string literal? So, the C creators decided to use a special character that changes treatment of the next char:

你必须使用转义字符。这是一个鸡和蛋的问题的解决方案:如果我需要它来终止字符串文字，我如何写一个" ?因此，C创作者决定使用一个特殊字符来改变下一个字符的处理方式:

printf("this is a \"quoted string\"");

Also you can use '\' to input special symbols like "\n", "\t", "\a", to input '\' itself: "\\" and so on.

你也可以使用“\”输入特别的符号，例如“\n”、“\t”、“\a”，输入“\”本身:“\”等等。

#7

This one also works:

这个也适用:

printf("%c\n", printf("Here, I print some double quotes: "));

But if you plan to use it in an interview, make sure you can explain what it does.

但如果你计划在面试中使用它，一定要解释它的作用。

EDIT: Following Eric Postpischil's comment, here's a version that doesn't rely on ASCII:

编辑:在Eric推迟评论之后，这里有一个不依赖ASCII的版本:

printf("%c\n", printf("%*s", '"', "Printing quotes: "));

The output isn't as nice, and it still isn't 100% portable (will break on some hypothetical encoding schemes), but it should work on EBCDIC.

输出不是很好，而且也不是100%可移植性的(会破坏一些假设的编码方案)，但是它应该可以在EBCDIC上工作。

#8

#include<stdio.h>
int main(){
char ch='"';
printf("%c",ch);
return 0;
}

Output: "

输出:“

#9

-1

you should use as: printf("\"");

您应该使用as: printf(“\”);

#1