“\0”的ASCII值与0的ASCII值相同?

7  

The ASCII character '0' is different than the number 0. You are printing the integer 0 in your second pair of printfs instead of '0'.

ASCII字符'0'与数字0不同。您在第二对printfs中打印整数0而不是“0”。

Try this:

试试这个:

printf("'\\0' : %d\n", '\0');
printf("'\\0' in hex : %x\n", '\0');
printf("'0' : %d\n", '0');
printf("'0' in hex: %x\n", '0');

Also, you don't need to escape ' inside strings. That is, "'" is fine and you don't need to write "\'"

而且，你不需要逃离“内部字符串”。也就是说，"'"很好，你不需要写"\ "

5  

You confuse 0, '\0', and '0'.

你把0和0混淆了。

The first two of these are the same thing; they just represent an int with value 0.

前两个是一样的;它们只是表示一个值为0的整数。

'0', however, is different, and represents an int with the value of the '0' character, which is 48.

但是，“0”是不同的，表示一个带有“0”字符的值，即48。

3  

Yes, the character literal'\0' has value 0 and this is independent of the character set.

是的，字符文字'\0'有值0，这是独立于字符集的。

(K&R2, 2.3) "The character constant '\0' represents the character with value zero, the null character. '\0' is often written instead of 0 to emphasize the character nature of some expression, but the numeric value is just 0."

(K&R2,2.3)字符常数'\0'表示值为零的字符，空字符。“\0”通常是写而不是0来强调某些表达式的性质，但数值是0。

0  

The ASCII value for '\0' is indeed 0. But '\0' is different from '0' (notice the backslash, which is the escape symbol).

“\0”的ASCII值确实为0。但是“\0”不同于“0”(注意反斜杠，也就是escape符号)。

0  

printf("0 : %d\n", '0');

Print like this, you will get 48.

像这样打印，你会得到48。

0  

Your last line should be

最后一行应该是。

printf("0 in hex: %x\n", '0');

0  

All of these answers seem to miss the point of \0 ...

所有这些答案似乎都忽略了这一点……

Try this:

试试这个:

printf("This line\0 might not completely appear");

That's the reason for \0

这就是\0的原因。

So you can define a NULL terminated string ...

你可以定义一个空终止字符串…

#define TEST_STRING "Test"

is quite different from

非常不同于

#define TEST_STRING "Test\0"

the latter being useful in certain cases.

后者在某些情况下是有用的。

7  

The ASCII character '0' is different than the number 0. You are printing the integer 0 in your second pair of printfs instead of '0'.

ASCII字符'0'与数字0不同。您在第二对printfs中打印整数0而不是“0”。

Try this:

试试这个:

printf("'\\0' : %d\n", '\0');
printf("'\\0' in hex : %x\n", '\0');
printf("'0' : %d\n", '0');
printf("'0' in hex: %x\n", '0');

Also, you don't need to escape ' inside strings. That is, "'" is fine and you don't need to write "\'"

而且，你不需要逃离“内部字符串”。也就是说，"'"很好，你不需要写"\ "

5  

You confuse 0, '\0', and '0'.

你把0和0混淆了。

The first two of these are the same thing; they just represent an int with value 0.

前两个是一样的;它们只是表示一个值为0的整数。

'0', however, is different, and represents an int with the value of the '0' character, which is 48.

但是，“0”是不同的，表示一个带有“0”字符的值，即48。

3  

Yes, the character literal'\0' has value 0 and this is independent of the character set.

是的，字符文字'\0'有值0，这是独立于字符集的。

(K&R2, 2.3) "The character constant '\0' represents the character with value zero, the null character. '\0' is often written instead of 0 to emphasize the character nature of some expression, but the numeric value is just 0."

(K&R2,2.3)字符常数'\0'表示值为零的字符，空字符。“\0”通常是写而不是0来强调某些表达式的性质，但数值是0。

0  

The ASCII value for '\0' is indeed 0. But '\0' is different from '0' (notice the backslash, which is the escape symbol).

“\0”的ASCII值确实为0。但是“\0”不同于“0”(注意反斜杠，也就是escape符号)。

0  

printf("0 : %d\n", '0');

Print like this, you will get 48.

像这样打印，你会得到48。

0  

Your last line should be

最后一行应该是。

printf("0 in hex: %x\n", '0');

0  

All of these answers seem to miss the point of \0 ...

所有这些答案似乎都忽略了这一点……

Try this:

试试这个:

printf("This line\0 might not completely appear");

That's the reason for \0

这就是\0的原因。

So you can define a NULL terminated string ...

你可以定义一个空终止字符串…

#define TEST_STRING "Test"

is quite different from

非常不同于

#define TEST_STRING "Test\0"

the latter being useful in certain cases.

后者在某些情况下是有用的。