TYPE CONVERSION in c++

 TYPE CONVERSION

converting a value from one data type to another. It can be done either implicitly (automatically by the compiler) or explicitly (manually by the programmer). 

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1. Implicit Type Conversion (Type Promotion)

This is done automatically by the compiler when converting a smaller data type to a larger data type or when compatible types are involved.

Example:

#include <iostream>

using namespace std;

 

int main() {

    int intVar = 10;

    double doubleVar = intVar; // Implicit conversion (int to double)

   

    cout << "Integer: " << intVar << endl;

    cout << "Double: " << doubleVar << endl;

    return 0;

}

Output:

Integer: 10

Double: 10.0000

 Advantages:

• Convenience: 
• Ease of use: 

Drawbacks:

• Precision loss: 
• Performance issues: 
• Unintended conversions: 

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2. Explicit Type Conversion (Type Casting)

In explicit conversion, the programmer specifies the type to which a value should be converted.

Syntax:

(type) expression;

Example:

#include <iostream>

using namespace std;

 

int main() {

    double doubleVar = 10.5;

    int intVar = (int)doubleVar; // Explicit conversion using C-style casting

   

    cout << "Double: " << doubleVar << endl;

    cout << "Integer: " << intVar << endl;

    return 0;

}

Output:

Double: 10.5

Integer: 10

 

Advantages:

• Control: 
• Versatility: 

Drawbacks:

• Complexity: 
• Error-prone: 
• Potential for misuse: 

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Common Casting Operators in C++:

1. static_cast: .
2. dynamic_cast: 
3. const_cast: 
4. reinterpret_cast: 

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