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NoraTheTurtleNoraTheTurtle
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add homework hack + rubric
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‎_notebooks/Foundation/tri1/Lessons/2025-10-14-1.14CallingInstanceMethods.ipynb‎

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"source": [
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"### Answer: D"
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]
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},
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{
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"cell_type": "markdown",
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"id": "794c9d84",
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"metadata": {},
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"source": [
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"---"
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]
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},
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{
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"cell_type": "markdown",
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"id": "22ee7f73",
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"metadata": {},
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"source": [
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"# Homework Hack"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 13,
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"id": "6da8bbc9",
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"metadata": {
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"vscode": {
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"languageId": "java"
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}
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},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"=== Student Grade Tracker System ===\n",
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"\n",
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"Creating student: Emma Rodriguez\n",
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"Student created successfully!\n",
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"\n",
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"--- Adding Grades for Emma ---\n",
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"Adding grade: 95 points\n",
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"Adding grade: 88 points\n",
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"Adding grade: 92 points\n",
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"Adding grade: 85 points\n",
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"\n",
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"--- Emma Rodriguez's Grade Report ---\n",
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"Student Name: Emma Rodriguez\n",
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"Total Points: 360\n",
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"Assignments Completed: 4\n",
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"Current Average: 90.00\n",
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"Letter Grade: A\n",
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"Status: Excellent work!\n",
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"\n",
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"========================================\n",
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"\n",
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"Creating student: James Wilson\n",
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"Student created successfully!\n",
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"\n",
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"--- Adding Grades for James ---\n",
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"Adding grade: 78 points\n",
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"Adding grade: 82 points\n",
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"Adding grade: 75 points\n",
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"\n",
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"--- James Wilson's Grade Report ---\n",
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"Student Name: James Wilson\n",
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"Total Points: 235\n",
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"Assignments Completed: 3\n",
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"Current Average: 78.33\n",
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"Letter Grade: C\n",
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"Status: Keep working hard!\n",
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"\n",
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"========================================\n",
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"\n",
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"Final Summary:\n",
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"Emma Rodriguez - Average: 90.00 (A)\n",
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"James Wilson - Average: 78.33 (C)\n"
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]
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}
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],
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"source": [
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"public class Student {\n",
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" // === Instance variables ===\n",
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" private String name;\n",
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" private int totalPoints;\n",
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" private int numAssignments;\n",
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"\n",
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" // === Constructor ===\n",
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" public Student(String name) {\n",
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" this.name = name;\n",
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" this.totalPoints = 0;\n",
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" this.numAssignments = 0;\n",
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" }\n",
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"\n",
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" // === Void instance methods (modify state) ===\n",
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" /** Adds a grade (0–100 recommended) and updates totals. */\n",
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" public void addGrade(int points) {\n",
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" totalPoints += points;\n",
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" numAssignments += 1;\n",
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" System.out.println(\"Adding grade: \" + points + \" points\");\n",
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" }\n",
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"\n",
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" /** Prints a formatted report of the student’s performance. */\n",
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" public void printReport() {\n",
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" System.out.println(\"\\n--- \" + name + \"'s Grade Report ---\");\n",
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" System.out.println(\"Student Name: \" + name);\n",
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" System.out.println(\"Total Points: \" + totalPoints);\n",
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" System.out.println(\"Assignments Completed: \" + numAssignments);\n",
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" double avg = getAverage();\n",
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" System.out.println(\"Current Average: \" + format2(avg));\n",
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" String letter = getLetterGrade();\n",
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" System.out.println(\"Letter Grade: \" + letter);\n",
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" System.out.println(\"Status: \" + statusFor(letter));\n",
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" }\n",
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"\n",
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" // === Non-void instance methods (return values) ===\n",
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" /** Returns current average as a double; 0.0 if no assignments yet. */\n",
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" public double getAverage() {\n",
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" if (numAssignments == 0) return 0.0;\n",
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" return (double) totalPoints / numAssignments;\n",
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" }\n",
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"\n",
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" /** Returns a letter grade based on the grading scale. */\n",
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" public String getLetterGrade() {\n",
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" double avg = getAverage();\n",
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" if (numAssignments == 0) return \"N/A\";\n",
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" if (avg >= 90) return \"A\";\n",
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" if (avg >= 80) return \"B\";\n",
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" if (avg >= 70) return \"C\";\n",
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" if (avg >= 60) return \"D\";\n",
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" return \"F\";\n",
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" }\n",
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"\n",
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" // === Helpers (private) ===\n",
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" private static String format2(double x) {\n",
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" return String.format(\"%.2f\", x);\n",
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" }\n",
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"\n",
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" private static String statusFor(String letter) {\n",
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" switch (letter) {\n",
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" case \"A\": return \"Excellent work!\";\n",
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" case \"B\": return \"Great job!\";\n",
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" case \"C\": return \"Keep working hard!\";\n",
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" case \"D\": return \"Needs improvement.\";\n",
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" case \"F\": return \"See me for help.\";\n",
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" default: return \"No grades yet.\";\n",
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" }\n",
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" }\n",
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"\n",
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" // === Demo / main ===\n",
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" public static void main(String[] args) {\n",
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" System.out.println(\"=== Student Grade Tracker System ===\\n\");\n",
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"\n",
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" // Student 1: Emma\n",
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" System.out.println(\"Creating student: Emma Rodriguez\");\n",
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" Student emma = new Student(\"Emma Rodriguez\");\n",
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" System.out.println(\"Student created successfully!\\n\");\n",
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"\n",
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" System.out.println(\"--- Adding Grades for Emma ---\");\n",
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" emma.addGrade(95);\n",
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" emma.addGrade(88);\n",
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" emma.addGrade(92);\n",
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" emma.addGrade(85);\n",
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" emma.printReport();\n",
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"\n",
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" System.out.println(\"\\n========================================\\n\");\n",
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"\n",
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" // Student 2: James\n",
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" System.out.println(\"Creating student: James Wilson\");\n",
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" Student james = new Student(\"James Wilson\");\n",
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" System.out.println(\"Student created successfully!\\n\");\n",
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"\n",
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" System.out.println(\"--- Adding Grades for James ---\");\n",
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" james.addGrade(78);\n",
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" james.addGrade(82);\n",
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" james.addGrade(75);\n",
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" james.printReport();\n",
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"\n",
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" System.out.println(\"\\n========================================\\n\");\n",
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"\n",
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" // Final summary\n",
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" System.out.println(\"Final Summary:\");\n",
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" System.out.println(emma.name + \" - Average: \" + format2(emma.getAverage()) + \" (\" + emma.getLetterGrade() + \")\");\n",
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" System.out.println(james.name + \" - Average: \" + format2(james.getAverage()) + \" (\" + james.getLetterGrade() + \")\");\n",
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" }\n",
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"}\n",
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"Student.main(null);"
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]
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},
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{
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"cell_type": "markdown",
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"id": "4a0062ae",
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"metadata": {},
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"source": [
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"| **Criteria** | **Percent Weight** | **Description** | **Self-Grade** | **Comments** |\n",
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"| ------------------------- | ------------------ | ------------------------------------------------------------------------------------------------------------------------------------- | -------------- | --------------------------------------------------------------------------------------- |\n",
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"| **Functionality** | 40% | Program runs without errors, creates multiple Student objects, correctly adds grades, calculates averages, and assigns letter grades | **40/40** | Code compiles cleanly; tested with multiple students; outputs match expected results. |\n",
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"| **Method Implementation** | 30% |Includes all required methods (addGrade, getAverage, getLetterGrade, printReport) that properly access/modify instance variables | **30/30** | All methods work as intended, returning accurate averages and letter grades. |\n",
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"| **Code Quality** | 20% | Clean code with meaningful variable names, proper constructor, and helpful comments explaining method purposes | **20/20** | Code is clear and well-commented; minor improvement possible in formatting consistency. |\n",
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"| **Output & Presentation** | 10% | Clear, well-formatted output showing multiple students with different grades and formatted reports | **10/10** | Output mirrors sample with spacing, dividers, and clear structure. |\n"
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]
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}
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],
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"metadata": {

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