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src/sqrt.cpp

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+/* Copyright (C) 2022 Harry Clark - Student No. 12340530 */
+/* Date: 22/12/22 */
+
+#include "sqrt.h"
+
+#ifndef NEWTON_SQRT
+#define NEWTON_SQRT
+
+int main(int* argc, char* argv)
+{
+	NEWTON::TOLERANCE = 1e-12;
+	NEWTON::ERROR = NEWTON::TOLERANCE + 1;
+	NEWTON::ITERATION = 0;
+	NEWTON::MAX_ITERATION = 100;
+	NEWTON::LATEST_RESULT;
+
+	while (NEWTON::ERROR > NEWTON::TOLERANCE && NEWTON::ITERATION < NEWTON::MAX_ITERATION)
+	{
+		NEWTON::LATEST_RESULT = NEWTON::RESULT + (NEWTON::RESULT * NEWTON::RESULT - 1) / (2 * NEWTON::RESULT);
+		NEWTON::ERROR = fabs(NEWTON::LATEST_RESULT - NEWTON::RESULT);
+		NEWTON::ITERATION++;
+	}
+
+	if(NEWTON::ERROR <= NEWTON::TOLERANCE)
+	{
+		std::cout << "The sqr is " << NEWTON::RESULT;
+	}
+
+	return 0;
+}
+
+#endif

src/sqrt.h

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+#pragma once
+
+#ifndef SQRT
+#define SQRT
+#include <iostream>
+#include <stdint.h>
+#include <stdlib.h>
+
+#define NEWTON_EQ
+#define NEWTON_DERIVATIVE
+
+typedef struct
+{
+	static double TOLERANCE;
+	static double ERROR;
+	static double RESULT;
+	static double LATEST_RESULT;
+	static double RESULT; 
+	static int MAX_ITERATION;
+	static int ITERATION;
+
+} NEWTON;
+
+#endif