turbo c++ easy programs

Sure! I can provide explanations for each step of some easy C++ programs. Here's an example program that calculates the factorial of a number:

#include <iostream>

using namespace std;

int main() {
    int num, factorial = 1;

    cout << "Enter a positive integer: ";
    cin >> num;

    for (int i = 1; i <= num; ++i) {
        factorial *= i;
    }

    cout << "The factorial of " << num << " is " << factorial << endl;

    return 0;
}

Explanation:

  • The program begins by including the iostream header file, which allows us to use input and output operations in C++.
  • We then use the using namespace std; statement to avoid having to write std:: before standard C++ library functions and objects.
  • The main() function is the entry point of the program.
  • Inside the main() function, we declare two variables: num to store the input number and factorial to store the factorial value.
  • We then prompt the user to enter a positive integer by using the cout object to display the message "Enter a positive integer: ", and the cin object to read the user's input into the num variable.
  • Next, we use a for loop to calculate the factorial of the input number. The loop iterates from i = 1 to i <= num, incrementing i by 1 in each iteration.
  • Within the loop, we update the factorial variable by multiplying it with the current value of i.
  • Once the loop completes, we use the cout object to display the calculated factorial value by concatenating the message "The factorial of ", the value of num, the message " is ", and the value of factorial.
  • Finally, we return 0 to indicate successful program execution.

This program calculates the factorial of a positive integer using a for loop and displays the result.