add randPosition method to generator

src/include/random.h

 #include <random>
+#include "coord.h"
 
 #ifndef RANDOM_H
 #define RANDOM_H
@@ -8,6 +9,7 @@ class Generator {
 		Generator();
 		int intFromRange(int, int);
 		double operator()();
+		Coord randPosition(Coord, Coord);
 	private:
 		std::mt19937 gen;
 };

src/random.cpp

 #include <random>
 #include "include/random.h"
+#include "include/coord.h"
 
 Generator::Generator() {
 	gen = std::mt19937(std::random_device()());
@@ -13,3 +14,7 @@ int Generator::intFromRange(int lower, int upper) {
 double Generator::operator()() {
 	return std::uniform_real_distribution<>(0, 1)(gen);
 }
+
+Coord Generator::randPosition(Coord a, Coord b) {
+	return Coord(intFromRange(a[0], b[0]), intFromRange(a[1], b[1]));
+}