How Can I Print the Textual Representation of a C Enum Value?

C : Printing Enum Value as Text

Enum types provide a convenient way to represent a set of constants with symbolic names. By default, enums are represented as integer values. However, in situations where you need to display the actual text associated with an enum value, the default behavior may not be suitable.

Let's consider an example:

enum Errors {
    ErrorA = 0,
    ErrorB,
    ErrorC,
};

Errors anError = ErrorA;
std::cout <p>In this example, we have an Errors enum with three possible values: ErrorA, ErrorB, and ErrorC, where ErrorA has a numerical value of 0. When we attempt to print the anError variable, it outputs "0" instead of the desired "ErrorA".</p><p>To solve this issue without resorting to if/switch statements, several methods can be employed:</p><p><strong>1. Using a Map:</strong></p><pre class="brush:php;toolbar:false">#include <map>
#include <string_view>

// Define a map to associate enum values with their string representations
std::map<errors std::string_view> errorStrings = {
    {ErrorA, "ErrorA"},
    {ErrorB, "ErrorB"},
    {ErrorC, "ErrorC"},
};

// Overload the `<p>With this method, the overloaded </p>
<p><strong>2. Using an Array of Structures:</strong></p>
<pre class="brush:php;toolbar:false">#include <string_view>

// Define a struct to store enum values and string representations
struct MapEntry {
    Errors value;
    std::string_view str;
};

// Define an array of structures
MapEntry entries[] = {
    {ErrorA, "ErrorA"},
    {ErrorB, "ErrorB"},
    {ErrorC, "ErrorC"},
};

// Overload the `<p>This method uses an array of structures to store the enum values and their string representations. A linear search is performed to find the matching string for the specified enum value.</p>
<p><strong>3. Using switch/case:</strong></p>
<pre class="brush:php;toolbar:false">#include <string>

// Overload the `<p>In this method, the overloaded </p></string>

The above is the detailed content of How Can I Print the Textual Representation of a C Enum Value?. For more information, please follow other related articles on the PHP Chinese website!