What is the difference between array length and string length?

The difference between the length of an array and the length of a string is that the ending flag is different and the characteristics are different.

1. The end sign is different.

String: Required'\0'End; The meaning of '0' is 'string terminator'.

Character array: It can contain multiple zeros, but if it is treated as a string, the actual valid string is a string signed by the first 0, and if it is treated as a character array, it can process any character of the character array, and all characters can be 0.

2. The characteristics are different.

A string is stored like an array of characters, so a single element of each of its bits can be extracted, e.g. s "abcdefghij", s 1 "b", s 9 j.

And the zero bit of a string is exactly its length, as in s 0 10 ( The above function ansistring does not. This can provide us with a lot of convenience, such as high-precision operations where each bit can be converted into numbers and stored in arrays.

An array of characters is an array used to store data of characters. The general form of its definition is: char array name data length .

An array of characters is used to hold characters or strings, and an element in an array of characters holds a character, which occupies one byte in memory. There are no string types in C, strings are stored in an array of characters.

Hello. It should be understood as such.

First of all, in the case of C, string implementations typically use arrays, for example.

char s = "hello";

There are five characters in hello, which are h, e, l, l o, and since C stipulates that arrays containing strings should be terminated with a string terminator, which is '0'

Therefore, the length of the array s in the above definition is 5 of the total number of characters, plus a terminator '0', which is 6

Then the length of the string is 5, but the length of the array s is 6, and as for the length of the popular array, it should be the number of elements that can be stored in the exponential group.

e.g. char s[100] ="hello";

Although the length of the string s is 5, the length of the array is 100, and I hope to understand.

For example, char a[ ]="xyz"and the length of char b[ ]= is 4 and 3, respectively

A 0 at the end of a string counts as one.

There will be a 0 at the end of the string

The array length is the length of the set of ordered orange sequences of elements.

If a set of finite variables of the same type is named, then the name is an array name. The individual variables that make up an array are called the components of the array, also known as the elements of the array, sometimes also called the subscript variables, and the numerical numbers used to distinguish the individual elements of the fraction group are called subscripts.

Array is a form in which several elements of the same type are organized in an ordered form in order to facilitate processing, and the set of these orderly arranged data elements of the same kind is called an array.

Array features:

1. Arrays are of the same data type.

of elements.

2. The storage of each element in the beam ruler array is in order, and they are continuously stored together in the memory of the slag preparation group according to this order.

3. The array element is represented by the name of the entire array and its own sequential position in the array. For example, a[0] represents the first element in an array with the name a, a[1] represents the second element of the array a, and so on.

String length refers to the number of characters a string contains, but does not include the last one'\0'。

Although formal strings can have arbitrary (but limited) lengths, the length of strings in actual language is often limited to an artificial maximum.

Generally speaking, there are two types of string data types: "fixed-length strings", which have a fixed maximum length and use the same amount of memory regardless of whether the maximum is reached; and "variable-length strings", the length of which is not arbitrarily fixed and depends on the actual size using a variable amount of memory. Most strings in modern programming languages are variable-length strings.

Despite the name, all variable-length strings have a limit on length, which generally depends only on the amount of memory available.

You can receive an integer as a string (no more than 10 strings long) and output an array of characters in reverse.

The actual length of a string can be calculated using the strlen function.

The method procedure is as follows:

#include

#include

main()

char a[10];int i,j;

scanf("%s",a);

j=strlen(a);

for(i=j-1;i>=0;i--)

printf("%c",a[i]);

printf("");

Hello. It should be understood as such.

First of all, the C language.

Let's talk about strings.

implementations typically use arrays, for example. chars

hello";

There are five characters in hello. respectively. h

ELLO has a rule in C that the array containing the string should be terminated with a string terminator.

That is, '0'

Therefore, the array s length in the above definition is the total number of characters 5 plus a terminator '0'

That's 6 then.

The length of the string is 5

But the length of the array s is 6

As for the length of the popular array, it should be the number of elements that can be stored in the exponential group.

For example, char

s[100]

hello";

Although the length of the string s is 5

But the length of the Legagic group is 100

Hope you understand.