Please write all your source code in this course
using the K&R style.

The K&R style defines where to place curly-braces
and how to indent.

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Sample from wikipedia

int main(int argc, char *argv[])
{
    ...
    while (x == y) {
        something();
        somethingelse();

        if (some_error)
            do_correct();
        else
            continue_as_usual();
    }

    finalthing();
    ...
}
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Example of if-else

    if (variable < 100) {
        variable = 100;
    } else {
        variable *= 0.99;
    }

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The major components of good style in this course...

   Be consistent with your use of curly-braces.
   Do not mix tabs and spaces together for indenting.
   Do not let lines wrap on an 80-character window.