C++ Program For int to char Conversion

An integer can be converted to a character when its value represents a valid character code or a decimal digit.

• Character-code conversion can map values such as 65 to 'A' and 97 to 'a'.
• A decimal digit can be converted to its character form using the '0' character offset.

Examples:

Input: N = 65
Output: A

Input: N = 97
Output: a

Approaches to Convert int to char in C++

The following approaches can be used to convert an integer to a character in C++:

1. Using C-style Type Casting

C-style type casting can explicitly convert an integer value to a character.

#include <iostream>
using namespace std;

int main()
{
    int num = 65;

    // Convert integer to character
    char ch = (char)num;

    cout << ch;

    return 0;
} 

A

Explanation

• The integer 65 is explicitly converted to char.
• In ASCII, 65 represents the character 'A'.

2. Using static_cast<char>()

static_cast<char>() is the preferred C++ approach for explicitly converting an integer to a character.

#include <iostream>
using namespace std;

int main()
{
    int num = 97;

    // Explicitly convert integer to character
    char ch = static_cast<char>(num);

    cout << ch;

    return 0;
} 

a

Explanation

• static_cast<char>() explicitly converts 97 to char.
• In ASCII, 97 represents the character 'a'.

3. Using Implicit Conversion

C++ can automatically convert an integer to a character when an int value is assigned to a char variable.

#include <iostream>
using namespace std;

int main()
{
    int num = 65;

    // Implicit conversion from int to char
    char ch = num;

    cout << ch;

    return 0;
} 

A

Explanation

• The integer 65 is automatically converted to char during assignment.
• The resulting character is 'A'.

4. Using Direct Initialization

A char variable can also be initialized directly using an integer value.

#include <iostream>
using namespace std;

int main()
{
    int num = 97;

    // Directly initialize char from integer
    char ch(num);

    cout << ch;

    return 0;
} 

a

Explanation

• The char variable is initialized directly with the integer value 97.
• The value is converted to the corresponding character.

5. Converting a Digit to Its Character Form

When the integer represents a single decimal digit from 0 to 9, adding '0' converts it to the corresponding character.

#include <iostream>
using namespace std;

int main()
{
    int digit = 5;

    // Convert digit to its character representation
    char ch = digit + '0';

    cout << ch;

    return 0;
} 

5

Explanation

• The integer 5 represents the numeric digit 5.
• Adding '0' maps it to the character '5'.
• This method is valid for digits from 0 to 9.