I believe my approach was okay for generating ternary (base 3) numbers, but for some reason I couldn’t get my algorithm to work. From last week’s Lesson, here’s what I tried:
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The ternary_out() Function
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Getting to Euler’s Number – Solution
The challenge for this month’s Exercise is not only to calculate Euler’s number, e, but to count how many loops a program must endure before your e value calculation matches the defined constant M_E. I hope you didn’t find this challenge too difficult.
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Dreaming of the ternary_out() Function
To generate a string of digits representing a value in a specific power base, such as base 3 (ternary), you need a power table. Using this power table, you can translate any positive integer into a string representation of the number in the given base. Sounds complex. Is complex.
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Getting to Euler’s Number
I enjoy reading about and studying mathematics. One of my favorite books is A History of π. I’ve used this book to inspire my Pi Day (March 14) programs. It’s fascinating stuff.
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Powers of Three
When the math nerds refer to a counting system, they use the word base. “We count in base 10,” they proclaim, adding, “Decimal” to sound important. Surely, these are the miracles of mathematics.
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Degrees to Radians to Degrees
The C language uses radians instead of degrees when calculating angles. Humans should use radians as well, as they’re logical and easy to work with (radians, not humans). What surprises me, however, is that the C library lacks a defined constant for making the degree-radian conversion.
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Creating a File “in the Raw” – with Permissions
Way back in April, I concluded my series on the “raw” file functions with a program that created a new file — but one that had no permissions. Thanks to input from readers and research into file-permission functions, I have a solution to the puzzle.
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Changing a File’s Permissions
In Unix-like operating systems, the chmod shell command alters a file’s permissions. From the C library, the chmod() function does the same thing.
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Tic-Tac-Toe Evaluation – Solution
The insidious part of this month’s Exercise is writing a function that doesn’t count a stalemate as a win. It’s what happened to me for my first draft of a solution.
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Examining File Type and Permissions
The value returned as a file’s inode mode is difficult to interpret, as covered in last week’s Lesson. That is, unless you use the macros and defined constants available in the sys/stat.h header file.
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