The difference between character array and string and its relation

Look at the following examples:

Char myname[] = {' L ', ' I ', ' s ', ' I '};       Character array <span style= "White-space:pre" >	</span> length is 4
char hename[] = {' L ', ' I ', ' s ', ' I ', '/'};//String c3/> length of 5
char yourname[10] = "Xiaoqiang";            String    length is 10 although only 9 characters

1 Definition: The string is an array of characters ending with '/'. Note, however, that ' strlen ' does not belong to the length of the string, it can be calculated using the length of the character array, and that sizeof is an operator, not a function. We can use sizeof (myName) to find the length of the character array, when ' s ' is counted.

2 Then, why does the normal array have no placeholders, and the character array has%s.

that we cannot

int num[] = {1, 2, 3};
printf ("%d", num);

<pre name= "code" class= "plain" > also cannot

printf ("%s", myName); After output, the content is:lisi\300\367\277_\377</strong></span></p>

But you can

printf ("%s,%s", YourName, Hename);

Because the string is an array of characters ending with '% ', printf encounters '/' will end the output

A summary is:

Strlen: The length of the string is not included '

sizeof: string lengths (including ' \ S ') and number of character array elements can be obtained