Session 8 Homework - Advanced Conditionals

📚 What You'll Practice

This homework focuses on mastering advanced conditional statements including if-else, else-if chains, logical operators, and nested conditions.

Goal: Become an expert in complex decision-making logic!

📋 Instructions

Master if-else and else-if statements
Understand logical operators (&&, ||, !)
Practice nested if statements
Build complex decision-making programs
Test with various input combinations

📊 Program 1: Grade Calculator with if-else

Use if-else chains for efficient grading!

What it does:

Uses else-if chains to efficiently determine letter grades based on score ranges, stopping at the first match.

#include <stdio.h>

int main() {
    int score;
    
    printf("Enter your score (0-100): ");
    scanf("%d", &score);
    
    if (score >= 90) {
        printf("Grade: A - Excellent! 🌟\n");
    } else if (score >= 80) {
        printf("Grade: B - Good job! 👍\n");
    } else if (score >= 70) {
        printf("Grade: C - Keep working! 📚\n");
    } else if (score >= 60) {
        printf("Grade: D - Need improvement! 💪\n");
    } else {
        printf("Grade: F - Let's study together! 📖\n");
    }
    
    return 0;
}

🧪 Test Cases

Score 95 → Grade A
Score 85 → Grade B
Score 75 → Grade C
Score 65 → Grade D
Score 45 → Grade F

🔗 Program 2: Logical Operators Practice

Master AND, OR, and NOT operators!

What it does:

Demonstrates the use of logical operators (&&, ||, !) in complex conditions for decision making.

#include <stdio.h>

int main() {
    int age, hasLicense, hasInsurance;
    char day;
    
    printf("Enter your age: ");
    scanf("%d", &age);
    
    printf("Do you have a license? (1=yes, 0=no): ");
    scanf("%d", &hasLicense);
    
    printf("Do you have insurance? (1=yes, 0=no): ");
    scanf("%d", &hasInsurance);
    
    printf("Enter day (W=weekday, S=weekend): ");
    scanf(" %c", &day);
    
    printf("\n=== LOGICAL OPERATOR RESULTS ===\n");
    
    // AND operator (&&)
    if (age >= 18 && hasLicense == 1) {
        printf("✅ You can drive! (Age >= 18 AND has license)\n");
    } else {
        printf("❌ You cannot drive yet.\n");
    }
    
    // OR operator (||)
    if (day == 'S' || day == 'W') {
        printf("✅ Valid day entered! (Weekend OR Weekday)\n");
    } else {
        printf("❌ Invalid day!\n");
    }
    
    // NOT operator (!)
    if (!(age < 16)) {
        printf("✅ You are 16 or older! (NOT under 16)\n");
    } else {
        printf("❌ You are under 16.\n");
    }
    
    // Complex condition with multiple operators
    if ((age >= 18 && hasLicense == 1) || (age >= 21 && hasInsurance == 1)) {
        printf("✅ You can rent a car! (Complex condition)\n");
    } else {
        printf("❌ You cannot rent a car.\n");
    }
    
    return 0;
}

🧪 Test Cases

Age 20, License 1, Insurance 0, Day W → Can drive, Valid day, 16+, Can rent
Age 17, License 0, Insurance 1, Day S → Cannot drive, Valid day, 16+, Cannot rent
Age 25, License 1, Insurance 1, Day W → Can drive, Valid day, 16+, Can rent

🏠 Program 3: Nested If Statements

Create complex decision trees!

What it does:

Demonstrates nested if statements for complex decision-making scenarios with multiple levels of conditions.

#include <stdio.h>

int main() {
    int age, hasTicket, hasMoney;
    char movieType;
    
    printf("=== MOVIE THEATER ACCESS ===\n");
    printf("Enter your age: ");
    scanf("%d", &age);
    
    printf("Do you have a ticket? (1=yes, 0=no): ");
    scanf("%d", &hasTicket);
    
    printf("Do you have money? (1=yes, 0=no): ");
    scanf("%d", &hasMoney);
    
    printf("Movie type (G=General, P=PG-13, R=Rated R): ");
    scanf(" %c", &movieType);
    
    printf("\n=== ACCESS DECISION ===\n");
    
    if (age >= 13) {
        printf("✅ Age check passed!\n");
        
        if (hasTicket == 1) {
            printf("✅ You have a ticket!\n");
            
            if (movieType == 'R') {
                if (age >= 17) {
                    printf("✅ You can watch the R-rated movie!\n");
                } else {
                    printf("❌ You're too young for R-rated movies!\n");
                }
            } else if (movieType == 'P') {
                printf("✅ You can watch the PG-13 movie!\n");
            } else if (movieType == 'G') {
                printf("✅ You can watch the General movie!\n");
            } else {
                printf("❌ Invalid movie type!\n");
            }
        } else {
            printf("❌ You need a ticket first!\n");
            
            if (hasMoney == 1) {
                printf("💡 You can buy a ticket at the counter!\n");
            } else {
                printf("💸 You need money to buy a ticket!\n");
            }
        }
    } else {
        printf("❌ You're too young for this theater!\n");
    }
    
    return 0;
}

🧪 Test Cases

Age 20, Ticket 1, Money 1, Type R → Can watch R-rated movie
Age 15, Ticket 1, Money 1, Type P → Can watch PG-13 movie
Age 18, Ticket 0, Money 1, Type G → Can buy ticket
Age 10, Ticket 1, Money 1, Type G → Too young for theater

🧩 Program 4: Complex Condition Builder

Build and test complex logical expressions!

What it does:

Allows users to test various combinations of logical conditions and see how they evaluate to true or false.

#include <stdio.h>

int main() {
    int a, b, c;
    int result1, result2, result3, result4;
    
    printf("=== COMPLEX CONDITION BUILDER ===\n");
    printf("Enter three numbers: ");
    scanf("%d %d %d", &a, &b, &c);
    
    printf("\nValues: a=%d, b=%d, c=%d\n", a, b, c);
    
    // Test various complex conditions
    result1 = (a > b) && (b > c);
    result2 = (a > b) || (b > c);
    result3 = !(a > b);
    result4 = (a > b) && (b > c) || (a > c);
    
    printf("\n=== CONDITION RESULTS ===\n");
    printf("(a > b) && (b > c): %s\n", result1 ? "TRUE" : "FALSE");
    printf("(a > b) || (b > c): %s\n", result2 ? "TRUE" : "FALSE");
    printf("!(a > b): %s\n", result3 ? "TRUE" : "FALSE");
    printf("(a > b) && (b > c) || (a > c): %s\n", result4 ? "TRUE" : "FALSE");
    
    // Practical example: Student eligibility
    int score = a;
    int attendance = b;
    int projects = c;
    
    printf("\n=== STUDENT ELIGIBILITY EXAMPLE ===\n");
    printf("Score: %d, Attendance: %d%%, Projects: %d\n", score, attendance, projects);
    
    if ((score >= 80 && attendance >= 90) || (score >= 90 && projects >= 3)) {
        printf("✅ Student is eligible for honors!\n");
    } else if (score >= 70 && attendance >= 80) {
        printf("✅ Student passes the course.\n");
    } else {
        printf("❌ Student needs improvement.\n");
    }
    
    return 0;
}

🧪 Test Cases

Input: 10, 5, 3 → Various logical evaluations
Input: 85, 95, 4 → Student eligible for honors
Input: 75, 85, 2 → Student passes course
Input: 60, 70, 1 → Student needs improvement

📋 Program 5: Menu-Driven Decision System

Create an interactive decision-making system!

What it does:

Creates a comprehensive menu system that uses all types of conditional statements for different decision-making scenarios.

#include <stdio.h>

int main() {
    int choice, age, score, temperature;
    char grade, weather;
    
    printf("=== INTERACTIVE DECISION SYSTEM ===\n");
    printf("1. Age-based decisions\n");
    printf("2. Grade evaluation\n");
    printf("3. Weather recommendations\n");
    printf("4. Score analysis\n");
    printf("Enter your choice (1-4): ");
    scanf("%d", &choice);
    
    switch (choice) {
        case 1:
            printf("Enter your age: ");
            scanf("%d", &age);
            
            if (age < 13) {
                printf("You're a child! Enjoy playing! 🧒\n");
            } else if (age >= 13 && age < 20) {
                printf("You're a teenager! Focus on studies! 🎓\n");
            } else if (age >= 20 && age < 65) {
                printf("You're an adult! Work hard! 💼\n");
            } else {
                printf("You're a senior! Enjoy retirement! 👴\n");
            }
            break;
            
        case 2:
            printf("Enter your grade (A/B/C/D/F): ");
            scanf(" %c", &grade);
            
            if (grade == 'A' || grade == 'a') {
                printf("Excellent work! Keep it up! 🌟\n");
            } else if (grade == 'B' || grade == 'b') {
                printf("Good job! You're doing well! 👍\n");
            } else if (grade == 'C' || grade == 'c') {
                printf("Average work. Try to improve! 📚\n");
            } else if (grade == 'D' || grade == 'd') {
                printf("Below average. Study more! 💪\n");
            } else if (grade == 'F' || grade == 'f') {
                printf("Failed. Let's work together! 📖\n");
            } else {
                printf("Invalid grade entered!\n");
            }
            break;
            
        case 3:
            printf("Enter temperature: ");
            scanf("%d", &temperature);
            printf("Weather type (S=sunny, R=rainy, C=cloudy): ");
            scanf(" %c", &weather);
            
            if (temperature > 80 && weather == 'S') {
                printf("Perfect beach weather! 🏖️\n");
            } else if (temperature < 50 || weather == 'R') {
                printf("Stay indoors! ☔\n");
            } else if (temperature >= 60 && temperature <= 80) {
                printf("Nice weather for a walk! 🚶\n");
            } else {
                printf("Check the weather before going out! 🌤️\n");
            }
            break;
            
        case 4:
            printf("Enter your test score: ");
            scanf("%d", &score);
            
            if (score >= 90) {
                printf("Outstanding! You're in the top 10%%! 🏆\n");
            } else if (score >= 80) {
                printf("Great job! Above average performance! 🎯\n");
            } else if (score >= 70) {
                printf("Good work! You're passing! ✅\n");
            } else if (score >= 60) {
                printf("Barely passing. Study more! 📖\n");
            } else {
                printf("Failing grade. Let's work together! 🤝\n");
            }
            break;
            
        default:
            printf("Invalid choice! Please select 1-4.\n");
    }
    
    return 0;
}

🧪 Test Cases

Choice 1, Age 15 → Teenager message
Choice 2, Grade A → Excellent work message
Choice 3, Temp 85, Weather S → Perfect beach weather
Choice 4, Score 95 → Outstanding message

🏠 Session 8 Homework

Advanced Conditionals

📚 What You'll Practice

📋 Instructions

📊 Program 1: Grade Calculator with if-else

What it does:

🧪 Test Cases

🔗 Program 2: Logical Operators Practice

What it does:

🧪 Test Cases

🏠 Program 3: Nested If Statements

What it does:

🧪 Test Cases

🧩 Program 4: Complex Condition Builder

What it does:

🧪 Test Cases

📋 Program 5: Menu-Driven Decision System

What it does:

🧪 Test Cases

🎯 Remember