#### Celsius to Fahrenheit

F
```/**
* @file
* @brief Conversion of temperature in degrees from [Celsius](https://en.wikipedia.org/wiki/Celsius)
* to [Fahrenheit](https://en.wikipedia.org/wiki/Fahrenheit).
*
* @author [Focusucof](https://github.com/Focusucof)
*/

#include <assert.h> /// for assert
#include <stdio.h>  /// for IO operations

/**
* @brief Convert celsius to Fahrenheit
* @param celsius Temperature in degrees celsius double
* @returns Double of temperature in degrees Fahrenheit
*/
double celcius_to_fahrenheit(double celsius) {
return (celsius * 9.0 / 5.0) + 32.0;
}

/**
* @brief Self-test implementations
* @returns void
*/
static void test() {
// 1st test
double input = 0.0;
double expected = 32.0;

double output = celcius_to_fahrenheit(input);

// 1st test
printf("TEST 1\n");
printf("Input: %f\n", input);
printf("Expected Output: %f\n", expected);
printf("Output: %f\n", output);
assert(output == expected);
printf("== TEST PASSED ==\n\n");

// 2nd test
input = 100.0;
expected = 212.0;

output = celcius_to_fahrenheit(input);

printf("TEST 2\n");
printf("Input: %f\n", input);
printf("Expected Output: %f\n", expected);
printf("Output: %f\n", output);
assert(output == expected);
printf("== TEST PASSED ==\n\n");

// 3rd test
input = 22.5;
expected = 72.5;

output = celcius_to_fahrenheit(input);

printf("TEST 3\n");
printf("Input: %f\n", input);
printf("Expected Output: %f\n", expected);
printf("Output: %f\n", output);
assert(output == expected);
printf("== TEST PASSED ==\n\n");
}

/**
* @brief Main function
* @returns 0 on exit
*/
int main() {
test();  // run self-test implementations
return 0;
}
```