C语言与C++的异同比较

#include 

int main() {
    int a = 10;
    printf("The value of a is: %d
", a);
    return 0;
}

#include 

int main() {
    int a = 10;
    int *p;
    p = &a;
    
    printf("The value of a is: %d
", *p);
    return 0;
}

#include 

class Rectangle {
private:
    int width, height;

public:
    Rectangle(int w, int h) : width(w), height(h) {}

    int area() {
        return width * height;
    }
};

int main() {
    Rectangle r(5, 10);
    std::cout << "The area of the rectangle is: " << r.area() << std::endl;
    return 0;
}

#include 
#include 

int main() {
    std::string str = "Hello, C++";
    std::cout << str << std::endl;
    return 0;
}