The results of the 27th International Obfuscated C Code Contest were announced earlier this month. The code is amazing. It runs. It’s horrifyingly cryptic.
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Like all IDEs, Code::Blocks is effectively a front for the clang, minGW, or gcc compiler lurking somewhere under its skin. While you don’t use these command line tools directly, you can control their options and settings from within the IDE.
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The traditional C compiler is cc. Its GNU replacement in the Linux world is gcc. A better option is the LLVM clang compiler. As commands typed at a prompt, you control these compilers by setting command line options or switches.
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In last week’s Lesson, I covered how to obtain the number of elements in an array. This process is the first step to emulating the foreach keyword in the C language.
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C has three looping keywords: do, for, and while. These keywords construct a block of statements that repeat, hopefully but not necessarily with a terminating condition. Other programming languages offer additional looping keywords, including the popular and useful foreach.
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A harmonic series is a mathematical contraption that deals with cascading fractions. Like the Fibonacci series, I thought I could easily code a harmonic series in C — which I did, but not before reading up on the topic of divergence.
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My maths grades were horrible. I understand the concepts, but failed at solutions in class because I’d make silly mistakes. Computers make mistakes only when they’re programmed to do so, which means maths are far more enjoyable for me as a coder. For example, take the Fibonacci sequence.
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The Chicken McNuggets problem, presented in last week’s Lesson, shows code that outputs the highest McNuggets number from 1 to 100. This value isn’t a combination of 6, 9, or 20, the number of the pieces offered in the McDonald’s Chicken McNuggets packages.
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Chicken McNuggets come several to a box, depending on what you order: six pieces for a kid, nine pieces for an adult, or twenty pieces for an honest adult. These numbers in various combinations form what the math nerds call McNugget Numbers.
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Oh, how I distrusted recursion when I was a budding programmer. It’s just a tough concept to wrap your head around, especially if you’re an old warhorse Assembly programmer like me who lives in fear of blowing up the stack. Trivial asides aside, recursion often presents an elegant and efficient way to solve a programming puzzle.
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