task 2

#include <stdio.h>

// Function prototypes
double celsius_to_fahrenheit(double celsius);
double celsius_to_kelvin(double celsius);
double fahrenheit_to_celsius(double fahrenheit);
double fahrenheit_to_kelvin(double fahrenheit);
double kelvin_to_celsius(double kelvin);
double kelvin_to_fahrenheit(double kelvin);

int main() {
    int choice;
    double temperature, converted_temperature;

    printf("Temperature Conversion Program\n");
    printf("------------------------------\n");
    printf("1. Celsius to Fahrenheit\n");
    printf("2. Celsius to Kelvin\n");
    printf("3. Fahrenheit to Celsius\n");
    printf("4. Fahrenheit to Kelvin\n");
    printf("5. Kelvin to Celsius\n");
    printf("6. Kelvin to Fahrenheit\n");
    printf("Enter your choice (1-6): ");
    scanf("%d", &choice);

    printf("Enter temperature value: ");
    scanf("%lf", &temperature);

    switch (choice) {
        case 1:
            converted_temperature = celsius_to_fahrenheit(temperature);
            printf("%.2f Celsius = %.2f Fahrenheit\n", temperature, converted_temperature);
            break;
        case 2:
            converted_temperature = celsius_to_kelvin(temperature);
            printf("%.2f Celsius = %.2f Kelvin\n", temperature, converted_temperature);
            break;
        case 3:
            converted_temperature = fahrenheit_to_celsius(temperature);
            printf("%.2f Fahrenheit = %.2f Celsius\n", temperature, converted_temperature);
            break;
        case 4:
            converted_temperature = fahrenheit_to_kelvin(temperature);
            printf("%.2f Fahrenheit = %.2f Kelvin\n", temperature, converted_temperature);
            break;
        case 5:
            converted_temperature = kelvin_to_celsius(temperature);
            printf("%.2f Kelvin = %.2f Celsius\n", temperature, converted_temperature);
            break;
        case 6:
            converted_temperature = kelvin_to_fahrenheit(temperature);
            printf("%.2f Kelvin = %.2f Fahrenheit\n", temperature, converted_temperature);
            break;
        default:
            printf("Invalid choice!\n");
            break;
    }

    return 0;
}

// Function to convert Celsius to Fahrenheit
double celsius_to_fahrenheit(double celsius) {
    return (celsius * 9 / 5) + 32;
}

// Function to convert Celsius to Kelvin
double celsius_to_kelvin(double celsius) {
    return celsius + 273.15;
}

// Function to convert Fahrenheit to Celsius
double fahrenheit_to_celsius(double fahrenheit) {
    return (fahrenheit - 32) * 5 / 9;
}

// Function to convert Fahrenheit to Kelvin
double fahrenheit_to_kelvin(double fahrenheit) {
    return (fahrenheit + 459.67) * 5 / 9;
}

// Function to convert Kelvin to Celsius
double kelvin_to_celsius(double kelvin) {
    return kelvin - 273.15;
}

// Function to convert Kelvin to Fahrenheit
double kelvin_to_fahrenheit(double kelvin) {
    return kelvin * 9 / 5 - 459.67;
}