How to define string in c++

C string is defined as a character array, which can be defined in two ways: character array or string literal: character array: char str[size], where str is the string name and size is the number of characters plus 1. String literal: "string literal", automatically allocated memory and terminated by the null character.

String defined in C

In C, a string is an array of characters. There are two ways to define a string:

1. Character array

The syntax for using a character array to define a string is as follows:

<code class="cpp">char str[size];</code>

str is the name of the string, size is the size of the array (number of characters 1).

Example:

<code class="cpp">char name[10];</code>

2. String literal

String literal is another way to define a string. The syntax is as follows:

<code class="cpp">"string literal"</code>

String literals automatically allocate memory and end with a null character ('\0').

Example:

<code class="cpp">string name = "John Doe";</code>

Note:

• Character arrays need to add null characters manually, while string literals are added automatically.
• String literals are immutable, which means that their contents cannot be modified.
• String class: C also provides the std::string class, which is a variable-length string type that provides more advanced functions. Such as splicing, comparison, search, etc.

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