From 55d6a8c5a87a3152cc05591a8ea8f4437e93d686 Mon Sep 17 00:00:00 2001
From: Myles Busig <mdbusig@gmail.com>
Date: Thu, 31 Oct 2024 01:16:38 -0700
Subject: [PATCH] Add problem 10 solution

---
 CMakeLists.txt |  2 ++
 include/p10.h  |  7 +++++++
 src/main.c     | 18 ++++++++++++++++++
 src/p10.c      | 16 ++++++++++++++++
 4 files changed, 43 insertions(+)
 create mode 100644 include/p10.h
 create mode 100644 src/p10.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 49a2609..57a11da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,3 +12,5 @@ set(proj_include "include")
 target_sources(${PROJECT_NAME} PRIVATE "${proj_sources}")
 target_include_directories(${PROJECT_NAME} PRIVATE "${proj_include}")
 
+target_link_libraries(${PROJECT_NAME} m)
+
diff --git a/include/p10.h b/include/p10.h
new file mode 100644
index 0000000..df34316
--- /dev/null
+++ b/include/p10.h
@@ -0,0 +1,7 @@
+#ifndef P10_H
+#define P10_H
+
+void calculate_magnitudes(double (*vectors)[8], int num_vectors, double *out_magnitudes);
+
+#endif
+
diff --git a/src/main.c b/src/main.c
index f14bc4c..5fed810 100644
--- a/src/main.c
+++ b/src/main.c
@@ -9,6 +9,7 @@
 #include "p7.h"
 #include "p8.h"
 #include "p9.h"
+#include "p10.h"
 
 void print_int_arr(int* arr, int size) {
 	for (int i = 0; i < size; ++i) {
@@ -114,6 +115,23 @@ int main(void) {
 		printf("Did not find any matching products!\n");
 	}
 
+	// Problem 10
+	printf("Problem 10:\n");
+
+	double vectors[3][8] = {
+		{ 1, 2, 3, 4, 5, 6, 7, 8 },
+		{ 0, 0, 0, 0, 0, 5, 0, 0 },
+		{ 1, 1, 1, 1, 1, 1, 1, 1 },
+	};
+
+	double magnitudes[3] = { 0 };
+
+	calculate_magnitudes(vectors, 3, magnitudes);
+
+	for (int i = 0; i < 3; ++i) {
+		printf("magnitude %d: %.2lf\n", i, magnitudes[i]);
+	}
+
 	return 0;
 }
 
diff --git a/src/p10.c b/src/p10.c
new file mode 100644
index 0000000..ae9317c
--- /dev/null
+++ b/src/p10.c
@@ -0,0 +1,16 @@
+#include "p10.h"
+
+#include <math.h>
+
+void calculate_magnitudes(double (*vectors)[8], int num_vectors, double* out_magnitudes) {
+	for (int i = 0; i < num_vectors; ++i) {
+		double sum_squares = 0.0;
+
+		for (int n = 0; n < 8; ++n) {
+			sum_squares += pow(vectors[i][n], 2);
+		}
+
+		out_magnitudes[i] = sqrt(sum_squares);
+	}
+}
+