AI Coding & CSE Fundamentals

#include <iostream>
using namespace std;

int main() {
    int num;
    cout << "Enter a number: ";
    cin >> num;

    if (num % 2 == 0)
        cout << num << " is Even." << endl;
    else
        cout << num << " is Odd." << endl;

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    char op;
    double num1, num2;
    cout << "Enter an operator (+, -, *, /): ";
    cin >> op;

    cout << "Enter two numbers: ";
    cin >> num1 >> num2;

    switch (op) {
        case '+': cout << "Result: " << num1 + num2 << endl; break;
        case '-': cout << "Result: " << num1 - num2 << endl; break;
        case '*': cout << "Result: " << num1 * num2 << endl; break;
        case '/': 
            if (num2 != 0)
                cout << "Result: " << num1 / num2 << endl;
            else
                cout << "Error! Division by zero." << endl;
            break;
        default: cout << "Invalid operator!" << endl;
    }

    return 0;
}

#include <iostream>
using namespace std;

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

    a = a + b;
    b = a - b;
    a = a - b;

    cout << "After swapping: " << a << " " << b << endl;
    return 0;
}

#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;
int main() {
    int result;
    const short maxValue = 6;
    const short minValue = 1;
    srand(time(nullptr));
    result = (rand() % (maxValue - minValue + 1)) + minValue;
    cout << result;    
    return 0;
}

#include <iostream>
#include <cmath>

using namespace std;
int main() {
    double radius;
    double area;
    const double PI = 3.14;
    cout << "Enter the radius of the circle: ";
    cin >> radius;
    area = PI * pow(radius,2);
    cout << "Area of circle: "<< area;
    return 0;
}

#include <iostream>
using namespace std;
int main() {
    double fahrenheitTemperature;
    double temperatureInCelsius;
    cout << "Enter your temperature in Fahrenheit:";
    cin >> fahrenheitTemperature;
    temperatureInCelsius = ((fahrenheitTemperature - 32) * 5) / 9;
    cout << "Temperature in celsius : " << temperatureInCelsius;
    return 0;
}

#include <iostream>

int main() {
    int a=1;
    int b=2;
    int temp;
    std::cout << "Before Swapping:\n";
    std::cout << "a=" << a <<",b=" << b <<"\n";
    temp = a;
    a=b;
    b=temp;
    std::cout << "After Swapping:\n";
    std::cout << "a=" << a <<",b=" << b <<"\n";
    return 0;
}

#include <iostream>

int main() {
    std::cout << "Hello World";
    return 0;
}

#include <stdio.h>

int main() {
    int x = 10;
    int *ptr = &x;
    *ptr = 20;
    printf("%d\n", x);
    return 0;
}