C Programming Language || Hands On Coding

#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;
}