Write a program that takes the speed (in km/h) and the time (in hours) as input and calculates the distance traveled using the formula: distance = speed * time.Create a class called Distance with speed and time as public attributes. Using a friend function, the program should calculate the total distance.

Sure, here is a simple C++ program that does what you asked for:

#include<iostream>
using namespace std;

class Distance {
public:
    float speed;
    float time;

    Distance(float s, float t) {
        speed = s;
        time = t;
    }

    friend float calculateDistance(Distance d);
};

float calculateDistance(Distance d) {
    return d.speed * d.time;
}

int main() {
    float speed, time;
    cout << "Enter speed in km/h: ";
    cin >> speed;
    cout << "Enter time in hours: ";
    cin >> time;

    Distance d(speed, time);
    cout << "The distance traveled is: " << calculateDistance(d) << " km" << endl;

    return 0;
}

This program first asks the user to input the speed and time. It then creates an instance of the Distance class with these values. The calculateDistance function is then called with this instance as an argument, and it returns the product of the speed and time. This value is then printed to the console.

Here is a simple C++ program that accomplishes this:

#include<iostream>
using namespace std;

class Distance {
public:
    float speed;
    float time;
};

float calculateDistance(Distance d) {
    return d.speed * d.time;
}

int main() {
    Distance d;
    cout << "Enter speed in km/h: ";
    cin >> d.speed;
    cout << "Enter time in hours: ";
    cin >> d.time;
    cout << "The distance traveled is: " << calculateDistance(d) << " km" << endl;
    return 0;
}

This program first defines a class Distance with speed and time as public attributes. Then it defines a function calculateDistance that takes an object of type Distance as an argument and returns the product of speed and time. In the main function, it prompts the user to enter the speed and time, calculates the distance using the calculateDistance function, and then prints the result.