A little program written in D to calculate the price range of items in LOTR mod trading from the average price.

tradingPrices.d

import std.stdio;

float readValue (string text) {
	float output;
	write(text);
	readf(" %s", &output);
	return output;
}

void printOut (float large, float small) {
	writeln("Range: ", small, "-", large);
}

int main() {
	
	float itemPrice, diff, large, small, oddAverage;
	
	while (1 == 1) {
		try {
			itemPrice = readValue("Item Price? ");
		} catch (std.conv.ConvException) {
			return 0;
		}
		oddAverage = itemPrice / 2 + 0.5;
		if (itemPrice % 2 == 0) {
			if (itemPrice % 4 == 0) {
				diff = itemPrice / 4;
				large = itemPrice + diff;
				small = itemPrice - diff;
				printOut(large, small);
			} else {
				diff = itemPrice / 4 + 0.5;
				large = itemPrice + diff;
				small = (itemPrice - diff) + 1;
				if (itemPrice == 2) {
					small = small - 1;
				}
				printOut(large, small);
			}
		} else {
			if (oddAverage % 2 != 0) {
				diff = (oddAverage / 2) + 0.5;
				large = itemPrice + diff;
				diff = (oddAverage / 2) + 0.5;
				small = itemPrice - diff;
				printOut(large, small);
			} else {
				diff = oddAverage / 2;
				large = itemPrice + diff;
				small = itemPrice - diff;
				printOut(large, small);
			}
		}
	}
}

Yep. Amazingly, 'r' is not a price :)

Yeah, pretty much the point of that. There would be cleaner ways to do that, such as reading to an intermediary type (Such as char or string) and then converting that, and depending on what it is, the program would behave differently. However, this makes more sense for a little program like this. It's easier.