Thought I commited this stuff lol

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "Playground/intro-pointers"]
+	path = Playground/intro-pointers
+	url = https://github.com/dbrumbaugh/intro-pointers

Adding Vectors.c

@@ -0,0 +1,30 @@
+/* Adding Vectors
+ *
+ * A Program that adds vectors given the components.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	float u1, u2, v1, v2; /* Components */
+	
+	/* Prompt user for variables */
+	printf("Enter the first component of vector 𝐮 (𝑢₁): ");
+	scanf("%f", &u1);
+	
+	printf("Enter the second component of vector 𝐮 (𝑢₂): ");
+	scanf("%f", &u2);
+
+	printf("Enter the first component of vector 𝐯 (𝑣₁): ");
+	scanf("%f", &v1);
+
+	printf("Enter the second component of vector 𝐯 (𝑣₂): ");
+	scanf("%f", &v2);
+
+	/* Print the sum of the vectors */
+	printf("𝐮 + 𝐯 = <%.2f, %.2f>\n", u1  + v1, u2 + v2);
+
+	return 0;
+}
+
+

After Decimal.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main () {
+	float n, d; /* Full Number, Decimal */
+	int i; /* Integer */
+
+	printf("Enter decimal number: ");
+	scanf("%f", &n);
+
+	i = (int)n;
+	d = n - i;
+
+	printf("The number after the decimal is %f", d);
+
+	return 0;
+}

Angle Between Two Vectors.c

@@ -0,0 +1,65 @@
+/* Angle Between Two Vectors
+ *
+ * A prgorgam that calculates the angle between to vectors 
+ * givien 𝑎 and 𝑏 of each vector.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main() {
+	float a1, b1, a2, b2; /* Vector Compenents */
+	
+	/* Print the vector forms */
+	printf("Vector form: 𝑎𝐢 + 𝑏𝐣 or <𝑎, 𝑏>\n");
+
+	/* Prompt user for variables */
+	printf("Enter 𝑎₁: ");
+	scanf("%f", &a1);
+
+	printf("Enter 𝑏₁: ");
+	scanf("%f", &b1);
+
+	printf("Enter 𝑎₂: ");
+	scanf("%f", &a2);
+
+	printf("Enter 𝑏₂: ");
+	scanf("%f", &b2);
+
+	/* Sanity Check
+	 * 
+	 * If 𝑎 and 𝑏 equal 0, exit the program.
+	 */
+	if ((a1 == 0 && b1 == 0) || (a2 == 0 && b2 == 0)) {
+		printf("Error: Division by 0\n");
+
+		exit(1);
+	};
+
+	/* Calculate values of additional variables */
+	float cosr = (a1 * a2 + b1 * b2) / (sqrt(a1 * a1 + b1 * b1) * sqrt(a2 * a2 + b2 * b2));
+	float r = acos(cosr); /* Angle in radians */ 
+	float d = r * (180 / M_PI); /* Angle in degrees */
+
+	/* Sanity Check
+	 *
+	 * Sometimes the caulculations are not percise enough.
+	 *
+ 	 * If variable cosr is greater than or equal to 1 or
+	 * less than or equal to -1, r = 0 or pi, and d = 0 or 180.
+	 */
+	if (cosr > 1) {
+		r = d = 0;
+	} else if (cosr < -1) {
+		r = M_PI;
+		d = 180;
+	}
+
+	/* Print angle between the two vectors */
+	printf("Angle in radians: %.2f\n", r);
+	printf("Angle in degrees: %.2f\n", d);
+
+	return 0;
+}
+
+

Area of a Triangle.c

@@ -0,0 +1,102 @@
+/* Area of a Triangle
+ *
+ * A prgorgam that cauclatales the area of a 
+ * triangle based on user-provided parameters.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main() {
+	int o; /* Option */
+
+	/* Print the options, then prompt */
+	printf("(1) ASA\n");
+	printf("(2) SAS\n");
+	printf("(3) SSS\n");
+	printf("(1|2|3) ");
+	scanf("%d", &o);
+
+	/* Sanity Check
+	 * 
+	 * If the user provides an argument that 
+	 * is not 1, 2, or 3, exit the program.
+	 */
+	if (o != 1 && o != 2 && o != 3) {
+	printf("Error: Invalid Argument\n");
+
+	exit(1);
+	}
+
+	/* ASA */
+	if (o == 1) {
+		float a1, s, a2;
+
+		/* Prompt user for variables */
+		printf("Enter the first angle: "); 
+		scanf("%f", &a1);
+		
+		printf("Enter the side: "); 
+		scanf("%f", &s);
+
+		printf("Enter the second angle: "); 
+		scanf("%f", &a2);
+		
+		/* Convert degrees to radians */
+		a1 = a1 * (M_PI / 180);
+		a2 = a2 * (M_PI / 180);
+
+		/* Print the area */
+		printf("Area = %.2f", (s * s * sin(a1) * sin(a2)) / (2 * sin(a1 + a2)));
+
+	}
+
+	/* SAS */
+	if (o == 2) {
+		float s1, a, s2;
+
+		/* Prompt user for variables */
+		printf("Enter the first side: "); 
+		scanf("%f", &s1);
+		
+		printf("Enter the angle: "); 
+		scanf("%f", &a);
+
+		printf("Enter the second side: "); 
+		scanf("%f", &s2);
+
+		/* Convert degrees to radians */
+		a = a * (M_PI / 180);
+
+		/* Print the area */
+		printf("Area = %.2f", 0.5 * s1 * s2 * sin(a));
+	}
+
+	/* SSS */
+	if (o == 3) {
+		float s1, s2, s3;
+
+		/* Prompt user for variables */
+		printf("Enter the first side: "); 
+		scanf("%f", &s1);
+		
+		printf("Enter the second side: "); 
+		scanf("%f", &s2);
+
+		printf("Enter the third side: "); 
+		scanf("%f", &s3);
+
+		/* Calculate the value of the additional variable, 𝑧 */
+		float z = (s1 + s2 + s3) / 2; /* 𝑧 */
+
+		/* Print the area */
+		printf("Area = %.2f", sqrt(z * (z - s1) * (z - s2) * (z - s3)));
+	}
+
+	return 0;
+}
+
+
+
+
+	

Arithmetic Sum.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main () {
+	float a1, d; /* Initial Term and Difference */
+	int n; /* Number of Element */
+	
+	printf("Enter the initial term (a1): ");
+	scanf("%f", &a1);
+
+	printf("Please enter the difference in the arithmetic sequence: ");
+	scanf("%f", &d);
+
+	printf("Please enter the number of elements the arithmetic sequence: ");
+	scanf("%d", &n);
+
+	printf("The sum of the terms is in the arithmetic sequence is %.2f\n", ((a1 + (a1 + (n - 1) * d)) / 2) * n);
+
+	return 0;
+}

Caulculator2.c

@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	/* Display a message before the program initiates */
+	printf("Preform an operation on two numbers.\n\n");
+
+	float n1, n2, r; /* Number One, Number Two, and Result */
+	char o; /* Operator */
+
+	/* Prompt the user for the numbers */
+	printf("Enter the first number: ");
+	scanf("%f", &n1);
+
+	printf("Enter the second number: ");
+	scanf("%f", &n2);
+
+	/* Prompt the user for the operator */
+	printf("Enter the operator (+|-|*|/): ");
+	scanf("\n%c", &o);
+
+
+	/* Preform the operation */
+	switch (o) {
+		case '+':
+			r = n1 + n2;
+
+			break;
+		case '-':
+			r = n1 - n2;
+
+			break;
+		case '*':
+			r = n1 * n2;
+
+			break;
+		case '/':
+			/* Sanity Check
+			 *
+			 * If n2, the second number, equals 0,
+			 * exit the program.
+			 */
+			if (n2 == 0) {
+				printf("Error: Cannot devide by 0\n");
+		
+				exit(1);
+			}
+
+
+			r = n1 / n2;
+
+			break;
+		/* If the provided value of the operator
+		 * is not (+|-|*|/), exit the program.
+		 */
+		default:
+			printf("Error: Invalid argument\n");
+
+			exit(1);
+	}
+
+	/* Print the result */
+	printf("Result: %.2f", r);
+
+			return 0;
+}

Complex Form To Trig Form.c

@@ -0,0 +1,63 @@
+/* Complex Form to trig Form
+ *
+ * A prgorgam that converts complex form to trig form 
+ * givien 𝑎 and 𝑏.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main() {
+	float a, b; /* First Nomial and Coeficient to 𝑖 */
+	
+	/* Print formulas */
+	printf("Complex Form --> Trig Form\n");
+	printf("Complex Form: 𝑎 + 𝑏𝑖\n");
+	printf("Trig Form: 𝑟(cosθ + 𝑖sinθ)\n");
+	printf("𝑎, 𝑏 != 0\n");
+
+	/* Prompt user for variables */
+	printf("Enter 𝑎: ");
+	scanf("%f", &a);
+
+	printf("Enter 𝑏: ");
+	scanf("%f", &b);
+
+	/* Sanity Check
+	 * 
+	 * If 𝑎 or 𝑏 equal 0, exit the program.
+	 */
+	if (a == 0 || b == 0) {
+		printf("Error: 𝑎 or 𝑏 cannot = 0\n");
+
+		exit(1);
+	};
+
+	/* Calculate values of additional variables */
+	float r = sqrt(a * a + b * b); /* 𝑟 */
+	float t = atan(b / a); /* θ */
+
+	/* Check for the quadrent of the number, 
+	 * and add the appropriate value to θ.
+	 * 
+	 * Quadrent I: Add nothing
+	 * Quadrent II or III: Add pi
+	 * Quadrent IV: Add 2 * pi
+	 */
+	if (a < 0) {  
+		/* Add pi */
+		t = t + M_PI;
+	} else {
+		if (b < 0) {
+			/* Add 2 * pi */
+			t = t + 2 * M_PI;
+		}
+	}	
+
+	/* Print number in trigonomic form */
+	printf("%.2f(cos(%.2f) + 𝑖sin(%.2f))\n", r, t, t);
+
+	return 0;
+}
+
+

Even Or Odd.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	int n; /* Number */
+
+	/* Prompt the user */
+	printf("Enter an integer: ");
+	scanf("%d", &n);
+
+	/* Determin whether or not the number is odd */
+	if (n / 2 != n / 2.0) /* Should have used remainder */
+		printf("%d is odd.\n", n);
+	else {
+		printf("%d is not odd.\n", n);
+
+		exit(1);
+	}
+
+	return 0;
+}
+
+
+
+
+	

Fahr-to-Celc.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+#define LOWER 0
+#define UPPER 300
+#define STEP  20
+
+/* Print Fahrenheit-Celcius table
+   for fahr = 0, 20, ..., 300 */
+main() {
+	float f, c; /* Fahrenheit and Celcuis Temperature */
+
+	/* Heading */
+	printf("Fahrenheit to Celcius\n");
+
+	for (f = UPPER; f >= LOWER; f = f - STEP) {
+		c = 5.0 / 9.0 * (f - 32);
+		printf("%6.1f\t%6.1f\n", f, c);
+	}
+}
+

If.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	float g; /* Grade */
+
+	/* Prompt the user */
+	printf("Enter the grade in percentage: ");
+	scanf("%f", &g);
+
+	/* Check if grade is > 60% */
+	if (g >= 60)
+		printf("Congratulations, your grade is passing.\n");
+	else {
+		printf("Sorry, try again.");
+
+		exit(1);
+	}
+
+	return 0;
+}
+
+
+
+
+	

Inupt-to-Output.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+main() {
+	int c; /* Character */
+
+	while ((c = getchar()) != EOF) 
+		putchar(c);
+}

Max Min 3 Numbers.c

@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	float n1, n2, n3; /* Numbers */
+
+	/* Prompt the user */
+	printf("Enter a number: ");
+	scanf("%f", &n1);
+
+	printf("Enter another number: ");
+	scanf("%f", &n2);
+
+	printf("Enter another number: ");
+	scanf("%f", &n3);
+
+	/* Find and print the maximum and minimum numbers
+	 *
+	 * n1 > n2 > n3
+	 */
+	if (n1 >= n2 && n2 >= n3) {
+		printf("The maximum is %.2f.\n", n1);
+		printf("The minimum is %.2f.\n", n3);
+		
+		exit(0);
+	/* n1 > n3 > n2 */
+	} if (n1 >= n3 && n3 > n2) {
+		printf("The maximum is %.2f.\n", n1);
+		printf("The minimum is %.2f.\n", n2);
+
+		exit(0);
+	/* n2 > n1 > n3 */
+	} if (n2 >= n1 && n1 > n3) {
+		printf("The maximum is %.2f.\n", n2);
+		printf("The minimum is %.2f.\n", n3);
+
+		exit(0);
+	/* n2 > n3 > n1 */
+	} if (n2 >= n3 && n3 > n1) {
+		printf("The maximum is %.2f.\n", n2);
+		printf("The minimum is %.2f.\n", n1);
+
+		exit(0);
+	/* n3 > n1 > n2 */
+	} if (n3 >= n1 && n1 > n2) {
+		printf("The maximum is %.2f.\n", n3);
+		printf("The minimum is %.2f.\n", n2);
+
+		exit(0);
+	/* n3 > n2 > n1 */
+	} if (n3 >= n2 && n2 > n1) {
+		printf("The maximum is %.2f.\n", n3);
+		printf("The minimum is %.2f.\n", n1);
+
+		exit(0);
+	}
+
+
+	return 1;
+}
+
+
+
+
+	

Max Min.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	float n1, n2; /* Numbers */
+
+	/* Prompt the user */
+	printf("Enter a number: ");
+	scanf("%f", &n1);
+
+	printf("Enter another number: ");
+	scanf("%f", &n2);
+
+	/* Find and print the maximum and minimum numbers */
+	if (n1 >= n2) {
+		printf("The maximum is %.2f.\n", n1);
+		printf("The minimum is %.2f.\n", n2);
+	} else {
+		printf("The maximum is %.2f.\n", n2);
+		printf("The minimum is %.2f.\n", n1);
+	}
+
+	return 0;
+}
+
+
+
+
+	

Max.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	float n1, n2; /* Numbers */
+
+	/* Prompt the user */
+	printf("Enter a number: ");
+	scanf("%f", &n1);
+
+	printf("Enter another number: ");
+	scanf("%f", &n2);
+
+	/* Find and print the maximum number */
+	if (n1 >= n2)
+		printf("The maximum is %.2f.\n", n1);
+	else
+		printf("The maximum is %.2f.\n", n2);
+
+	return 0;
+}
+
+
+
+
+	

Playground/intro-pointers

@@ -0,0 +1 @@
+Subproject commit 2847f8b921dbbc772a2f13490af95bb8dc9b202a

Pointers.c

@@ -0,0 +1,20 @@
+/* Program 2.1 from PTRTUT10.HTM   6/13/97 */
+
+#include <stdio.h>
+
+int my_array[] = {1,23,17,4,-5,100};
+int *ptr;
+
+int main(void)
+{
+    int i;
+    ptr = my_array;     /* point our pointer to the first
+                                      element of the array */
+    printf("\n\n");
+    for (i = 0; i < 6; i++)
+    {
+      printf("my_array[%d] = %d   ",i,my_array[i]);   /*<-- A */
+      printf("ptr + %d = %d\n",i, *(++ptr));
+    }
+    return 0;
+}

Pointers1.c

@@ -0,0 +1,20 @@
+/* Program 1.1 from PTRTUT10.TXT   6/10/97 */
+
+#include <stdio.h>
+
+int j, k;
+int *ptr;
+
+int main(void)
+{
+    j = 1;
+    k = 2;
+    ptr = &k;
+    printf("\n");
+    printf("j has the value %d and is stored at %p\n", j, (void *)&j);
+    printf("k has the value %d and is stored at %p\n", k, (void *)&k);
+    printf("ptr has the value %p and is stored at %p\n", ptr, (void *)&ptr);
+    printf("The value of the integer pointed to by ptr is %d\n", *ptr);
+
+    return 0;
+}

Reverse.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+	int n; /* Number to Be Reversed */
+
+	/* Prompt for number */
+	printf("Enter a 3 digit integer: ");
+	scanf("%d", &n);
+
+	/* Define the digits */
+	int d1 = n / 100;
+	int d2 = (int)(n / 10) - d1 * 10;
+	int d3 = n - (d1 * 100 + d2 * 10);
+
+	/* Print the digits in reverse */
+	printf("Reverse of digits: %d%d%d\n", d3, d2, d1);
+
+	return 0;
+}

Sum Of Three Digit Number.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main () {
+	int tdn; /* Three Digit Number */
+	
+	printf("Enter a three digit number: ");
+	scanf("%d", &tdn);
+
+	int d1 = tdn / 100;
+	int d2 = (int)(tdn / 10) - d1 * 10;
+	int d3 = tdn - (d1 * 100 + d2 * 10);
+	
+	printf("digit 1: %d\n", d1);
+	printf("digit 2: %d\n", d2);
+	printf("digit 3: %d\n", d3);
+
+	printf("The sum of the digits is %d\n", d1 + d2 + d3);
+
+	return 0;
+}

ncurses.c

@@ -0,0 +1,20 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <curses.h>
+
+int main() {
+	initscr();
+	cbreak();
+	noecho();
+
+	int x = 40;
+	int y = 60;
+	char ch = 'x';
+	mvaddch(x, y, ch);
+
+ 	getch();
+	endwin();
+
+	return 0;
+
+}