C++ Programs: Problem & Answer

Q: Write a program to read n integer/char values from the keyboard and display the result on the screen.

#include <iostream>
using namespace std;

class Person
{
    char name[30];
    int age,roll,cls;

public:
   void getdata();
   void display();
};

void Person::getdata()
{
    cout<<"\nEnter Your Name: ";
    cin.getline(name, 30);
    cout<<"\nEnter Age: ";
    cin>>age;
    cout<<"\nRoll: ";
    cin>>roll;
    cout<<"Class: ";
    cin>> cls; 
}

void Person::display(){
    cout<<"\nName: "<< name;
    cout<<"\nAge: " << age;
    cout<<"\nRoll: " << roll;
    cout <<"\nClass: " << cls;
}

int main()
{
    Person data;
    data.getdata();
    data.display();
    return 0;
}

Q2: Write a program to display the following output using a single cout statement
Maths = 90
Physics = 77
Chemistry = 69

#include <iostream>
using namespace std;

int main() {
    cout << "Maths = 90\nPhysics = 77\nChemistry = 69" << endl;
    return 0;
}

Q3: Write a program to read two numbers from the keyboard and display the larger value on the screen.

#include <iostream>
using namespace std;

int main() {
    int num1, num2;

    // Read the two numbers from the keyboard
    cout << "Enter the first number: ";
    cin >> num1;

    cout << "Enter the second number: ";
    cin >> num2;

    // Find and display the larger value
    if (num1 > num2) {
        cout << "The larger value is: " << num1 << endl;
    } else {
        cout << "The larger value is: " << num2 << endl;
    }

    return 0;
}

Q4: Write a program that inputs a character and displays its corresponding ASCII value on the screen.

#include <iostream>
using namespace std;

int main() {
    char ch;

    // Read the character from the keyboard
    cout << "Enter a character: ";
    cin >> ch;

    // Display its corresponding ASCII value
    cout << "The ASCII value of '" << ch << "' is: " << static_cast<int>(ch);

    return 0;
}

Q5: Write a program to read the value of a, b, and c and display the value of x where
x = a/b -c

#include <iostream>
using namespace std;

int main() {
    double a, b, c, x;

    // Read the values of a, b, and c from the keyboard
    cout << "Enter the value of a: ";
    cin >> a;

    cout << "Enter the value of b: ";
    cin >> b;

    cout << "Enter the value of c: ";
    cin >> c;

    // Calculate the value of x
    x = a / b - c;

    // Display the value of x
    cout << "The value of x is: " << x << endl;

    return 0;
}

Q6: Write C++ program that will ask for a temperature in Fahrenheit and display it in Celsius.

#include <iostream>
using namespace std;

int main() {
    double fahrenheit, celsius;

    // Read the temperature in Fahrenheit from the user
    cout << "Enter the temperature in Fahrenheit: ";
    cin >> fahrenheit;

    // Convert Fahrenheit to Celsius
    celsius = (fahrenheit - 32) * 5 / 9;

    // Display the temperature in Celsius
    cout << "Temperature in Celsius: " << celsius << endl;

    return 0;
}

Q7: Redo the N.6 program using a class called “temp” and member functions.

#include <iostream>
using namespace std;

class Temp {
    double fahrenheit;
    double celsius;

public:
    void getTemperature();
    void convertToCelsius();
    void displayTemperature();
};

void Temp::getTemperature() {
    cout << "Enter the temperature in Fahrenheit: ";
    cin >> fahrenheit;
}

void Temp::convertToCelsius() {
    celsius = (fahrenheit - 32) * 5 / 9;
}

void Temp::displayTemperature() {
    cout << "Temperature in Fahrenheit: " << fahrenheit << endl;
    cout << "Temperature in Celsius: " << celsius << endl;
}

int main() {
    Temp temperature;
    temperature.getTemperature();
    temperature.convertToCelsius();
    temperature.displayTemperature();

    return 0;
}

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