حل lab2 برمجة1 جامعة الامام

Lab 2 (1 page, 6 Exercises)

Exercise 1

Write a C++ program that computes the sum of numbers less than or equal to n where n is given by the user.

#include <iostream>
using namespace std;

int main() {
    int n, sum = 0;
    cout << "Enter a number: ";
    cin >> n;

    for (int i = 1; i <= n; i++)
        sum += i;

    cout << "Sum = " << sum << endl;
    return 0;
}

Exercise 2

Write a C++ program that computes the sum of even numbers less than or equal to n where n is given by the user.

#include <iostream>
using namespace std;

int main() {
    int n, sum = 0;
    cout << "Enter a number: ";
    cin >> n;

    for (int i = 2; i <= n; i += 2)
        sum += i;

    cout << "Sum of even numbers = " << sum << endl;
    return 0;
}

Exercise 3

Write a C++ program that computes the sum of even numbers that are in the range [a, b] where a and b are given by the user.

2.3 
#include <iostream>
using namespace std;

int main() {
    int a, b, sum = 0;
    cout << "Enter two numbers (a and b): ";
    cin >> a >> b;

    for (int i = a; i <= b; i++) {
        if (i % 2 == 0)
            sum += i;
    }

    cout << "Sum of even numbers = " << sum << endl;
    return 0;
}

Exercise 4

Write a C++ program that computes the minimum of n numbers given by the user.

#include <iostream>
using namespace std;

int main() {
    int n, num, min;
    cout << "How many numbers? ";
    cin >> n;

    cout << "Enter number 1: ";
    cin >> min;

    for (int i = 2; i <= n; i++) {
        cout << "Enter number " << i << ": ";
        cin >> num;
        if (num < min)
            min = num;
    }

    cout << "Minimum number is: " << min << endl;
    return 0;
}

Exercise 5

Write a C++ program that prints a number n given by the user in the reverse order (7163 => 3617).

#include <iostream>
using namespace std;

int main() {
    int n;
    cout << "Enter a positive integer: ";
    cin >> n;

    if (n < 0) {
        cout << "Please enter a non-negative integer." << endl;
        return 1;
    }

    cout << "Reversed number: ";
    if (n == 0) {
        cout << 0;
    }

    while (n > 0) {
        cout << n % 10;  // Print the last digit
        n = n / 10;      // Remove the last digit
    }

    cout << endl;
    return 0;
}

Exercise 6

Write a C++ program that computes the least common multiplier (LCM) of two numbers n and p given by the user.

#include <iostream>
using namespace std;

int main() {
    int n, p;

    cout << "Enter the first number (n): ";
    cin >> n;
    cout << "Enter the second number (p): ";
    cin >> p;

    if (n <= 0 || p <= 0) {
        cout << "INAVLID ENTRY, Please enter positive integers only." << endl;
    }
    else{
    //int maxVal = (n > p) ? n : p;
    int maxVal;
    if(n>p)
    maxVal=n;
    else maxVal=p;
    // Start from max(n, p) and find the first number divisible by both
    while (true) {
        if (maxVal % n == 0 && maxVal % p == 0) {
            cout << "The Least Common Multiple (LCM) of " << n << " and " << p << " is: " << maxVal << endl;
            break;
        }
        maxVal++;
     }
    }
    return 0;
}