From 7bb7fc04b1bf8ecc74a5fcd8b264159fc0a996a4 Mon Sep 17 00:00:00 2001
From: Alvie Rahman <alvierahman90@gmail.com>
Date: Fri, 6 Oct 2023 16:44:56 +0100
Subject: [PATCH] c14

---
 C14/Makefile |  1 +
 C14/ex1.c    | 32 ++++++++++++++++++++++++++++++++
 C14/ex2.c    | 29 +++++++++++++++++++++++++++++
 C14/ex3.c    | 33 +++++++++++++++++++++++++++++++++
 Makefile     |  4 ++++
 5 files changed, 99 insertions(+)
 create mode 100644 C14/Makefile
 create mode 100644 C14/ex1.c
 create mode 100644 C14/ex2.c
 create mode 100644 C14/ex3.c
 create mode 100644 Makefile

diff --git a/C14/Makefile b/C14/Makefile
new file mode 100644
index 0000000..bb69e69
--- /dev/null
+++ b/C14/Makefile
@@ -0,0 +1 @@
+include ../Makefile
diff --git a/C14/ex1.c b/C14/ex1.c
new file mode 100644
index 0000000..eebd18d
--- /dev/null
+++ b/C14/ex1.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <math.h>
+
+void cartesian_to_polar(float x, float y, float *r, float *theta) {
+	*r = sqrtf(x*x + y*y);
+	*theta = y/x;
+}
+
+int main() {
+	int rc;
+	float x, y, r, theta;
+
+	printf("x: ");
+	rc = scanf("%f", &x);
+	// check that scanf was successful by checking if it returned 1 (1 successfully scanned item)
+	if (rc != 1) {
+		printf("Please enter a real number\n");
+		return 1;
+	}
+
+	printf("y: ");
+	rc = scanf("%f", &y);
+	if (rc != 1) {
+		printf("Please enter a real number\n");
+		return 1;
+	}
+
+	cartesian_to_polar(x, y, &r, &theta);
+	printf("r=%f theta=%f\n", r, theta);
+
+	return 0;
+}
diff --git a/C14/ex2.c b/C14/ex2.c
new file mode 100644
index 0000000..28d0a70
--- /dev/null
+++ b/C14/ex2.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <math.h>
+
+
+float degrees_to_radians(float degrees) {
+	return M_PI * degrees / 180.0;
+}
+
+void process(float degrees, float* radians, float* sin_val, float* cos_val, float* tan_val) {
+	*radians = degrees_to_radians(degrees);
+	*sin_val = sin(*radians);
+	*cos_val = cos(*radians);
+	*tan_val = tan(*radians);
+}
+
+
+int main() {
+	float degrees, radians, sin_val, cos_val, tan_val;
+
+	printf("Degrees: ");
+	scanf("%f", &degrees);
+
+	process(degrees, &radians, &sin_val, &cos_val, &tan_val);
+
+	printf("Radians: %f\n", radians);
+	printf("Sine: %f\n", sin_val);
+	printf("Cosine: %f\n", cos_val);
+	printf("Tangent: %f\n", tan_val);
+}
diff --git a/C14/ex3.c b/C14/ex3.c
new file mode 100644
index 0000000..de55733
--- /dev/null
+++ b/C14/ex3.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <math.h>
+
+
+float degrees_to_radians(float degrees) {
+	return M_PI * degrees / 180.0;
+}
+
+void process(float degrees, float* radians, float* sin_val, float* cos_val, float* tan_val) {
+	*radians = degrees_to_radians(degrees);
+	*sin_val = sin(*radians);
+	*cos_val = cos(*radians);
+	*tan_val = tan(*radians);
+}
+
+
+int main() {
+	int degrees_start, degrees_end;
+	float radians, sin_val, cos_val, tan_val;
+
+	printf("Start: ");
+	scanf("%d", &degrees_start);
+	printf("End: ");
+	scanf("%d", &degrees_end);
+	printf("Degs\tRad\tsin\tcos\ttan\n");
+
+	for (int i = degrees_start; i <= degrees_end; i++) {
+		process((float)i, &radians, &sin_val, &cos_val, &tan_val);
+		printf("%d\t%0.3f\t%0.3f\t%0.3f\t%0.3f\n", i, radians, sin_val, cos_val, tan_val);
+	}
+
+
+}
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..01e2cdf
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+CFLAGS=-lm
+
+%.c:
+	$(CC) $(CFLAGS) -c $< -o $*