C++ program to make mobile application

 Creating a mobile application using C++ is a complex task that requires a deep understanding of mobile app development, C++ programming, and the underlying mobile platform (e.g., Android or iOS). Here's a simplified example of a C++ program that demonstrates basic mobile app functionality:

*Android App using C++ (via Android NDK)*

To create an Android app using C++, you'll need to use the Android NDK (Native Development Kit). Here's a basic example:

```

// main.cpp

#include <android/native_activity.h>

#include <android/native_window.h>

#include <android/rect.h>

void android_main(struct android_app* app) {

    // Initialize the app

    app->onInit();

    // Create a window

    ANativeWindow* window = app->window;

    if (window) {

        // Set the window dimensions

        ANativeWindow_setWidth(window, 800);

        ANativeWindow_setHeight(window, 600);

        // Draw something on the window

        ANativeWindow_Buffer buffer;

        if (ANativeWindow_lockBuffer(window, &buffer, NULL)) {

            // Draw a red rectangle

            memset(buffer.bits, 0xFF0000, buffer.width * buffer.height * 4);

            ANativeWindow_unlockBuffer(window, &buffer);

        }

    }

    // Clean up

    app->onDestroy();

}

```

*iOS App using C++ (via Objective-C++)*

To create an iOS app using C++, you'll need to use Objective-C++ (a combination of Objective-C and C++). Here's a basic example:

```

// main.mm

#import <UIKit/UIKit.h>

class MyApp : public UIApplication {

public:

    MyApp() {}

    ~MyApp() {}

    void applicationDidFinishLaunching(UIApplication *application) {

        // Create a window

        UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

        // Create a view

        UIView *view = [[UIView alloc] initWithFrame:window.bounds];

        view.backgroundColor = [UIColor redColor];

        // Add the view to the window

        [window addSubview:view];

        // Make the window visible

        [window makeKeyAndVisible];

    }

};

int main(int argc, char *argv[]) {

    @autoreleasepool {

        return UIApplicationMain(argc, argv, nil, NSStringFromClass([MyApp class]));

    }

}

```

Note that these examples are highly simplified and don't demonstrate a real-world mobile app. To create a more complex app, you'll need to use a framework or library that provides a higher-level API for mobile app development.

Some popular frameworks for mobile app development using C++ include:

- Qt (cross-platform)

- SDL (cross-platform)

- Cocos2d-x (cross-platform)

- Android NDK (Android-specific)

- Objective-C++ (iOS-specific)

Keep in mind that using C++ for mobile app development can be challenging due to the complexity of the underlying mobile platforms. You may want to consider using a higher-level language like Java or Swift, or a cross-platform framework like React Native or Flutter.

C++ program to calculate an employee's salary

 Here's a simple C++ program to calculate an employee's salary:

#include <iostream>

#include <string>

using namespace std;

class Employee {

private:

    string name;

    int employeeId;

    string department;

    double basicSalary;

    double allowance;

    double deduction;

    double netSalary;

public:

    void inputDetails() {

        cout << "Enter employee name: ";

        cin.ignore();

        getline(cin, name);

        cout << "Enter employee ID: ";

        cin >> employeeId;

        cout << "Enter department: ";

        cin.ignore();

        getline(cin, department);

        cout << "Enter basic salary: ";

        cin >> basicSalary;

        cout << "Enter allowance: ";

        cin >> allowance;

        cout << "Enter deduction: ";

        cin >> deduction;

    }

    void calculateNetSalary() {

        netSalary = basicSalary + allowance - deduction;

    }

    void displayDetails() {

        cout << "\nEmployee Details\n";

        cout << "Name: " << name << endl;

        cout << "Employee ID: " << employeeId << endl;

        cout << "Department: " << department << endl;

        cout << "Basic Salary: $" << basicSalary << endl;

        cout << "Allowance: $" << allowance << endl;

        cout << "Deduction: $" << deduction << endl;

        cout << "Net Salary: $" << netSalary << endl;

    }

};

int main() {

    Employee employee;

    employee.inputDetails();

    employee.calculateNetSalary();

    employee.displayDetails();

    return 0;

}

*Example Output:*

Enter employee name: John Doe

Enter employee ID: 123

Enter department: HR

Enter basic salary: 5000

Enter allowance: 1000

Enter deduction: 500

Employee Details

Name: John Doe

Employee ID: 123

Department: HR

Basic Salary: $5000

Allowance: $1000

Deduction: $500

Net Salary: $5500

This program defines an `Employee` class with private member variables for employee details and public methods for inputting details, calculating the net salary, and displaying details.

In the `main()` function, an `Employee` object is created, and the user is prompted to input employee details. The program then calculates the net salary and displays the employee details.