There are the following methods for assigning values to strings in C: 1. Direct initialization; 2. Assignment operator; 3. Copy constructor; 4. Literals; 5. Assignment from character array; 6. Assignment from stringstream .
Assigning value to string in C
String is a basic data type widely used in C , used to store and manipulate text data. In C, there are several common methods for assigning values to strings:
1. Direct initialization
The simplest method is to use direct initialization syntax:
<code class="cpp">std::string my_string = "Hello world!";</code>
2. Assignment operator
You can use the assignment operator=
to assign a string to another string:
<code class="cpp">std::string new_string; new_string = "Hello there!";</code>
3. Copy constructor
The copy constructor creates a new string whose content is the same as the original string:
<code class="cpp">std::string original_string = "Original"; std::string copied_string(original_string);</code>
4. Literal
Literals are a simplified syntax that can directly assign values to strings:
<code class="cpp">auto literal_string = "This is a literal string.";</code>
5. Assign values from character arrays
Data can be assigned to a string from a character array:
<code class="cpp">char c_array[] = "C-style string"; std::string from_array(c_array);</code>
6. Assignment from stringstream
Data can be extracted from a stringstream and assigned to a string:
<code class="cpp">std::stringstream ss; ss << "Data from stringstream"; std::string from_stream; ss >> from_stream;</code>
According to different situations, choosing the most appropriate assignment method can improve the readability and efficiency of the code.
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