horton | HORTON: Helpful Open-source Research TOol for N-fermion systems

In C the string is always terminated with a \0 character, so the length of the string is the number of characters + 1. So, in case you need to initialise a string of 12 characters, you must "allow one element for the termination character" (from p.221, "Beginning C", Horton).

All right, let's try

So I tried to write a program to tell me the circumference and area of a circle when I input the radius but it don't want to work ( I am following instructions from a book (Beginning C by Ivor Horton's)) so here is the program ;

Using SQL Server JSON functionality how is it possible to extract just the postcode from the following google maps JSON output?

Please Note: Unfortunately the address_components are not always returned in the same order so looking for

I'm new to ExpressJS, and NodeJS. I've been trying to Google, and have went through a few different StackOverflow posts, but cannot seem to find an answer to this.

I followed a YouTube video, and created an array called users. I created get and put methods for this, which I can call upon, and then use res.send('message'), which works. But whenever I try to update "name" belonging to a specific user, I constantly get the values "undefined". I've tried:

I am using Visual Studio 2019 (Community edition) running on a Windows 10 machine. I have created a simple console application and I want to import the format module so that I can use something like std::format(). I get an error that 'cannot find header 'format' to import. My code is based on a book by Horton and van Weet titled 'Beginning C++ 20' which starts with two lines namely: import iostream (this is contained in angled brackets) followed by a line which says import format also contained within angled brackets. Maybe let me rephrase my question. The code generated by Visual Studio says #include iostream but does not allow me to #include format. So, when do I use #include and when do I use import?

I have written a base 64 encoding / decoding library for the Arduino IDE (yes, I am aware such libraries already exist. This is for my own education as much as anything practical). My target microcontroller is an Espressif ESP32.

In my base64 decoding function, the index variable i is affected by the presence of a Serial.println() debug statement. It is the strangest thing I have ever seen and I cannot figure out why it should make a difference if there is debug printing or not.

Using the test program base64.ino and the b64.cpp functions below, here are two samples of my serial output. In the first example, I'm using a Serial.println(i); in the function b64dec() just after the for loop. In the second example, the Serial.println(i); is commented out. That is the only difference and I get two drastically different results.

Am I missing something here? Is it a compiler optimization gone wonky? My understanding of C variable scoping is that there are only global, function, and parameter levels. The i in the for loop should be the same as the int i = 0; a few lines above it. I don't believe it's buffer eoverflow either, since the debugging output of 13 for the decoded length is accurate for a 12 character message and its NULL terminator.

This is what I expect to get any time I run it:

This is my sample dataframe