I remember memorizing the “times tables,” which is how most American kids learn to multiply. Committing single digit multiplication values to memory helps perform multiplication and division problems, but it’s not the only way to calculate the result.
Continue reading
Learning division in school means long division. The process involves a quotient and a remainder. For example, 42÷8 works out to 5 (quotient) with 2 remainder. On a computer, however, division renders the result as 5.25. So how do you get the remainder separated?
Continue reading
The original K&R, the first C programming book — and truly the programming book all others are based upon, is famous for its “Hello, world!” program. It’s the first program in the book. But what about the second program? Do you know what it is?
Continue reading
Bouncing a cursor on the screen is a fun programming exercise, and you can use common C library techniques and ANSI escape sequences to make it happen in a terminal window, as covered in last week’s Lesson. At this point, most programmers would be content and leave well enough alone. Not me!
Continue reading
My solution for this month’s Exercise relies upon the solution from last month’s Exercise, specifically the way the matrixes are presented in the main() function and the use of the output() function. What I added is the multiply() function, which multiplies the two matrixes.
Continue reading
For last week’s Lesson, I gathered various techniques to show how the terminal screen can be manipulated directly in C without using a library like Ncurses. I have a few more tricks to show.
Continue reading
The task for last month’s Exercise was to describe complex data — a matrix. For this month’s Exercise, your task is to multiply these matrixes.
Continue reading
I miss the bad old days, back when I first learned to program. The microcomputers of the day were single user, single task. The hardware was directly accessible. You can truly do some messing around, which was quite entertaining for a budding programmer.
Continue reading
Coding a Look-and-Say sequence should be fun, just like any C programming project where you’re not under pressure from a deadline. From last week’s Lesson, I was able to create a nested loop that takes a number and outputs its Look-and-Say values. It’s time to update this code to output a sequence.
Continue reading
You may have seen this sequence on the Internet, in one of those “guess which number goes next?” type of posts:
1 11 21 1211 ...
So, which number comes next? I suppose it’s possible to divine a solution mathematically, but this sequence is known as a Look-and-Say sequence.
Continue reading