The classical introductory exercise. Just say "Hello, World!".
"Hello, World!" is the traditional first program for beginning programming in a new language or environment.
The objectives are simple:
If everything goes well, you will be ready to fetch your first real exercise.
Make sure you have read the C page on the Exercism site. This covers the basic information on setting up the development environment expected by the exercises.
Get the first test compiling, linking and passing by following the three rules of test-driven development.
The included makefile can be used to create and run the tests using the test
task.
make test
Create just the functions you need to satisfy any compiler errors and get the test to fail. Then write just enough code to get the test to pass. Once you've done that, move onto the next test.
As you progress through the tests, take the time to refactor your implementation for readability and expressiveness and then go on to the next test.
Try to use standard C99 facilities in preference to writing your own low-level algorithms or facilities by hand.
This is an exercise to introduce users to using Exercism http://en.wikipedia.org/wiki/%22Hello,_world!%22_program
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
#include <stddef.h>
#include "vendor/unity.h"
#include "../src/hello_world.h"
void setUp(void)
{
}
void tearDown(void)
{
}
void test_hello(void)
{
TEST_ASSERT_EQUAL_STRING("Hello, World!", hello());
}
int main(void)
{
UnityBegin("test/test_hello_world.c");
RUN_TEST(test_hello);
UnityEnd();
return 0;
}
#include <stdio.h>
#include <stddef.h>
#include "hello_world.h"
void hello(char *buffer, const char *name)
{
if (name != NULL) {
sprintf(buffer, "Hello, %s!", name);
} else {
sprintf(buffer, "Hello, World!");
}
}
A huge amount can be learned from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.
Here are some questions to help you reflect on this solution and learn the most from it.
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