Added all previous files

lab2/graph.c

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+// Author: Owen Dorweiler
+// Class: Fundementals of Computing
+// Assignment: Lab 2, Part 3
+// Description: Computes and prints graph of equation using x and y
+
+#include <stdio.h>
+#include <math.h>
+
+int main() {
+  // Initialize variables
+  double minX, minY, maxX, maxY;
+  double startX = 0.0, endX = 10.0, step = 0.2;
+
+  
+  // Print plot title
+  printf("\nPlot for y = 12+(5*sin(2*x))+(6*cos(3*x)) for x from %.1f to %.1f", startX, endX);
+  printf("\nX\tY");
+  
+  // Define starting max and min
+  double y;
+  y = 12+(5*sin(2*startX))+(6*cos(3*startX));
+  minY = y;
+  maxY = y;
+  minX = startX;
+  maxX = startX;
+
+  // Calculate y, check if max or min
+  for (double x = startX; x <= endX; x = x + step) {
+    y = 12+(5*sin(2*x))+(6*cos(3*x));
+    if (minY > y) {
+      minY = y;
+      minX = x;
+    }
+    if (maxY < y) {
+      maxY = y;
+      maxX = x;
+    }
+
+    // Print line of plot
+    printf("\n%.2f\t%.2f\t", x, y);
+    int roundY = (int)floor(y);
+    for (int a = 1; a <= roundY; a++)
+      printf("#");
+  } 
+  
+  // Print max and min
+  printf("\nThe maximum of %.2f was at %.2f", maxY, maxX);
+  printf("\nThe minimum of %.2f was at %.2f\n", minY, minX);
+}

lab2/mortgage.c

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+// Author: Owen Dorweiler
+// Class: Fundementals of Computing
+// Assignment: Lab 2, Part 2
+// Description: Calculates time it takes to pay off a mortgage given the principal, interest rate, and monthly payment
+
+#include <stdio.h>
+#include <math.h>
+
+int main() {
+  // Initialize user defined variables
+  double principal, payment, rate;
+
+  // Get inputs from user
+  printf("Enter principal (initial amount): ");
+  scanf("%lf", &principal);
+  printf("Enter yearly interest rate (%): ");
+  scanf("%lf", &rate);
+  printf("Enter monthly payment: ");
+  scanf("%lf", &payment);
+
+  // Initialize variables
+  double balance = principal, interest, totalPaid = 0, monthRate = rate/12;
+  int totalMonths = 0;
+
+  // Check to if payment is less than interest; if so, display error
+  if (payment < balance * monthRate / 100)
+    printf("You cannot pay off your mortgage because your monthly payment is less than your initial monthly interest.\n");
+  
+  else {
+    // Print header
+    printf("\nMonth\tPayment\t\tInterest\tBalance");
+
+    // Calculate and display table
+    for (int month = 1; balance > 0; month++) {
+    
+      // Calculate interest
+      interest = balance * monthRate / 100;
+    
+      // Check if balance is 0, and calculate balance
+      if (payment > balance) {
+        payment = balance;
+        balance = 0;
+      }
+      else balance = balance + interest - payment;
+
+      // Sum totals
+      totalPaid += payment;
+      totalMonths++;
+    
+      printf("\n%d\t$%.2f\t\t$%.2f\t\t$%.2f", month, payment, interest, balance);
+    }
+
+    // Calculate and print total stats
+    int years = totalMonths / 12;
+    int months = totalMonths % 12;
+    printf("\n\nYou paid a total of $%.2f over %d years and %d months.\n\n", totalPaid, years, months);
+  }
+}

lab2/report.txt

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+Author: Owen Dorweiler
+Class: Fundementals of Computing
+Assignment: Lab 2, Lab Report
+
+The third program (graph.c) works as follows:
+
+From a user perspective, the user simply runs the program and it graphs the equation.
+
+Internally, the program starts by defining three important variables: startX, endX, and step. These variables correspond to the starting x value, the ending x value, and the step size. These are not values the user inputs, but the programmer can change them and it will change the behavior of the program. I did this so validation would be easier and the program would be more flexible.
+
+The program prints the plot title and sets the maximum and minimum values to the values at startX. It then goes steps from startX to endX with the given step size, calculating y, checking to see if it is a new maximum or minimum, and plotting it as a bar graph.
+
+If the new y value is a max or min, it overwrites the previous max or min value.
+
+The program displays two decimal places, but rounds y to the nearest whole number for plotting.
+
+At the end of the program, it displays the maximum and minimum and the x value for each.
+
+I validated the output by comparing it to a graph generated by a graphing calculator, and manually checked the maximum and minumum points.

lab2/table.c

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+// Author: Owen Dorweiler
+// Class: Fundementals of Computing
+// Assignment: Lab 2, Part 1
+// Description: Gets two numerical inputs and outputs a multiplication table
+
+#include <stdio.h>
+
+int main() {
+  // Declare variables
+  int num1, num2;
+
+  // Get inputs	
+  printf("Input first number: ");
+  scanf("%d", &num1);
+  printf("Input second number: ");
+  scanf("%d", &num2);
+
+  // Print table header
+  printf("*");
+  for (int a = 1; a <= num1; a++) {
+    printf("\t%d", a);
+  }
+  
+  // Print table
+  for (int b = 1; b <= num2; b++) {
+    printf("\n%d |", b);
+    for (int c = 1; c <= num1; c++) {
+      printf("\t%d", b * c);
+    }
+  }
+  printf("\n");
+}