How do you convert integer to objects in c?

Answer 1

There are no objects in C, so you can't.

However, in C++ you can convert an integer to an object if the object's class exposes a public conversion constructor that accepts an integer argument. For example:

class X {

public:

X (int); // conversion constructor

// ...

};

How the conversion is implemented depends on the class designer. In the following example, a user can construct a complex number type from an integer:

class complex {

private:

double r;

double i;

public:

complex (double real, double imaginary): r {real}, i {imaginary} {}

complex (int real): r {real}, i {0.0} {}

// ...

};

Here, the implementation implicitly converts the integer to a double and assigns that value to the real representation and assigns the value 0.00 to the imaginary representation. This class may be used as follows:

complex c = 42; // e.g., c.r = 42.0, c.i = 0.0

If a conversion constructor is provided, a corresponding conversion assignment is usually provided as well:

class complex { private:

double r;

double i;

public:

complex (double real, double imaginary): r {real}, i {imaginary} {}

complex (int real): r {real}, i {0.0} {}

complex& operator= (int real) { r = real; i = 0.0; }

// ...

};

This class may be used as follows:

complex c {1.1, -3.14};

// ...

c = 42; // e.g., c.r = 42.0, c.i = 0.0