Scenario-Based Coding Questions on 2D Arrays in C++

#include <iostream>
using namespace std;

int main() {
    int sales[3][4];
    
    cout << "Enter sales data for 3 products over 4 days:\n";
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            cout << "Product " << i + 1 << ", Day " << j + 1 << ": ";
            cin >> sales[i][j];
        }
    }
    
    cout << "\nTotal Sales for Each Product:\n";
    for (int i = 0; i < 3; i++) {
        int total = 0;
        for (int j = 0; j < 4; j++) {
            total += sales[i][j];
        }
        cout << "Product " << i + 1 << ": " << total << " units\n";
    }
    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int map[5][5];

    cout << "Enter the 5x5 treasure map (0 for empty, 1 for treasure):\n";
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 5; j++) {
            cin >> map[i][j];
        }
    }

    cout << "\nTreasure found at:\n";
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 5; j++) {
            if (map[i][j] == 1) {
                cout << "Row " << i+1 << ", Column " << j+1 << endl;
            }
        }
    }
    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int rows, cols;
    
    cout << "Enter the number of rows: ";
    cin >> rows;
    cout << "Enter the number of columns: ";
    cin >> cols;

    int battlefield[rows][cols];

    cout << "Enter the battlefield grid (each value represents a robot's health):\n";
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            cin >> battlefield[i][j];
        }
    }

    int maxHealth = -1, rowIndex = -1, colIndex = -1;

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            if (battlefield[i][j] > maxHealth) {
                maxHealth = battlefield[i][j];
                rowIndex = i;
                colIndex = j;
            }
        }
    }

    cout << "\nStrongest robot is at Row " << (rowIndex + 1) << ", Column " << (colIndex + 1) << " with health " << maxHealth << ".\n";

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int restaurants, categories;
    cout << "Enter the number of restaurants: ";
    cin >> restaurants;
    cout << "Enter the number of rating categories: ";
    cin >> categories;

    int ratings[restaurants][categories];

    for(int i = 0; i < restaurants; i++) {
        cout << "Enter ratings for restaurant " << i+1 << ": ";
        for(int j = 0; j < categories; j++)
            cin >> ratings[i][j];
    }

    for(int i = 0; i < restaurants; i++) {
        int sum = 0;
        for(int j = 0; j < categories; j++)
            sum += ratings[i][j];

        cout << "Average rating for restaurant " << i+1 << ": " << (double)sum/categories << endl;
    }

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int sections, shelves;
    cout << "Enter the number of sections: ";
    cin >> sections;
    cout << "Enter the number of shelves per section: ";
    cin >> shelves;

    int books[sections][shelves];

    for(int i = 0; i < sections; i++) {
        cout << "Enter number of books for section " << i+1 << " on each shelf: ";
        for(int j = 0; j < shelves; j++)
            cin >> books[i][j];
    }

    for(int i = 0; i < sections; i++) {
        int total = 0;
        for(int j = 0; j < shelves; j++)
            total += books[i][j];

        cout << "Total books in section " << i+1 << ": " << total << endl;
    }

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int rows, cols;
    cout << "Enter the number of rows for the map: ";
    cin >> rows;
    cout << "Enter the number of columns for the map: ";
    cin >> cols;

    char map[rows][cols];
    cout << "Enter the treasure map characters: \n";
    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < cols; j++) {
            cin >> map[i][j];
        }
    }

    for(int i = 0; i < rows; i++) {
        int vowelCount = 0;
        for(int j = 0; j < cols; j++) {
            char ch = map[i][j];
            if(ch == 'a' || ch == 'A' || ch == 'e' || ch == 'E' || ch == 'i' || ch == 'I' || ch == 'o' || ch == 'O' || ch == 'u' || ch == 'U') {
                vowelCount++;
            }
        }
        cout << "Vowel count in row " << i + 1 << ": " << vowelCount << endl;
    }

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int potions, ingredients, magicNumber;
    cout << "Enter number of potions: ";
    cin >> potions;
    cout << "Enter number of ingredients per potion: ";
    cin >> ingredients;

    int potency[potions][ingredients];

    for(int i=0; i<potions; i++) {
        cout << "Enter potency values for potion " << i+1 << ": ";
        for(int j=0; j<ingredients; j++)
            cin >> potency[i][j];
    }

    cout << "Enter magical stability number: ";
    cin >> magicNumber;

    int stableCount = 0;

    for(int i=0; i<potions; i++) {
        int sum = 0;
        for(int j=0; j<ingredients; j++)
            sum += potency[i][j];
        if(sum == magicNumber)
            stableCount++;
    }

    cout << "Number of stable potions: " << stableCount << endl;
    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int rows, cols;
    cout << "Enter the number of rows for the radar grid: ";
    cin >> rows;
    cout << "Enter the number of columns for the radar grid: ";
    cin >> cols;

    int radar[rows][cols];
    cout << "Enter signal values for radar grid: \n";
    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < cols; j++)
            cin >> radar[i][j];
    }

    int alienSignals = 0;

    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < cols; j++) {
            int signal = radar[i][j];
            bool isPrime = true;
            if(signal <= 1) {
                isPrime = false;
            } else {
                for(int k = 2; k * k <= signal; k++) {
                    if(signal % k == 0) {
                        isPrime = false;
                        break;
                    }
                }
            }

            if(isPrime) {
                alienSignals++;
            }
        }
    }

    cout << "Number of alien signals detected: " << alienSignals << endl;
    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int plants, days;
    cout << "Enter the number of plants: ";
    cin >> plants;
    cout << "Enter the number of days: ";
    cin >> days;

    int growth[plants][days];

    cout << "Enter the growth rates for each plant on each day: \n";
    for(int i = 0; i < plants; i++) {
        for(int j = 0; j < days; j++) {
            cin >> growth[i][j];
        }
    }

    int maxGrowth = -1;
    int minGrowth = 1000000;  
    int maxGrowthPlant = -1;
    int minGrowthPlant = -1;

    for(int i = 0; i < plants; i++) {
        int totalGrowth = 0;
        for(int j = 0; j < days; j++) {
            totalGrowth += growth[i][j];
        }
        
        if(totalGrowth > maxGrowth) {
            maxGrowth = totalGrowth;
            maxGrowthPlant = i;
        }
        
        if(totalGrowth < minGrowth) {
            minGrowth = totalGrowth;
            minGrowthPlant = i;
        }
    }

    cout << "Plant " << maxGrowthPlant + 1 << " experienced the greatest growth of " << maxGrowth << endl;
    cout << "Plant " << minGrowthPlant + 1 << " experienced the least growth of " << minGrowth << endl;

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int categories, products;

    cout << "Enter the number of pet categories: ";
    cin >> categories;
    cout << "Enter the number of product types: ";
    cin >> products;

    int inventory[categories][products];

    for (int i = 0; i < categories; i++) {
        for (int j = 0; j < products; j++) {
            cout << "Enter the stock for product type " << j+1 << " in category " << i+1 << ": ";
            cin >> inventory[i][j];
        }
    }

    cout << "\nTotal stock for each product type across all categories:" << endl;
    for (int j = 0; j < products; j++) {
        int totalProductStock = 0;
        for (int i = 0; i < categories; i++) {
            totalProductStock += inventory[i][j];
        }
        cout << "Product type " << j+1 << ": " << totalProductStock << " items" << endl;
    }

    cout << "\nTotal stock for each pet category:" << endl;
    for (int i = 0; i < categories; i++) {
        int totalCategoryStock = 0;
        for (int j = 0; j < products; j++) {
            totalCategoryStock += inventory[i][j];
        }
        cout << "Category " << i+1 << ": " << totalCategoryStock << " items" << endl;
    }

    int totalStoreStock = 0;
    for (int i = 0; i < categories; i++) {
        for (int j = 0; j < products; j++) {
            totalStoreStock += inventory[i][j];
        }
    }
    cout << "\nTotal stock for the entire store: " << totalStoreStock << " items" << endl;

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int rows, cols;

    cout << "Enter the number of streets: ";
    cin >> rows;
    cout << "Enter the number of intersections: ";
    cin >> cols;

    int cityGrid[rows][cols];

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            cout << "Enter the number of vehicles at intersection (" << i+1 << "," << j+1 << "): ";
            cin >> cityGrid[i][j];
        }
    }

    double totalGreenTime = 0; 
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            double greenTime = cityGrid[i][j] * 0.5;
            totalGreenTime += greenTime;
            cout << "Intersection (" << i+1 << "," << j+1 << ") should have a green light for " << greenTime << " seconds." << endl;
        }
    }

    cout << "Total green light time for the entire city: " << totalGreenTime << " seconds." << endl;

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int imageRows, imageCols, transformRows, transformCols;

    cout << "Enter the number of rows and columns for the image matrix: ";
    cin >> imageRows >> imageCols;
    cout << "Enter the number of rows and columns for the transformation matrix: ";
    cin >> transformRows >> transformCols;

    if (imageCols != transformRows) {
        cout << "Matrix multiplication is not possible. The number of columns in the image matrix must equal the number of rows in the transformation matrix." << endl;
        return 0;
    }

    int imageMatrix[imageRows][imageCols];
    int transformMatrix[transformRows][transformCols];
    int resultMatrix[imageRows][transformCols];

    cout << "Enter the elements of the image matrix: " << endl;
    for (int i = 0; i < imageRows; i++) {
        for (int j = 0; j < imageCols; j++) {
            cout << "imageMatrix[" << i << "][" << j << "]: ";
            cin >> imageMatrix[i][j];
        }
    }

    cout << "Enter the elements of the transformation matrix: " << endl;
    for (int i = 0; i < transformRows; i++) {
        for (int j = 0; j < transformCols; j++) {
            cout << "transformMatrix[" << i << "][" << j << "]: ";
            cin >> transformMatrix[i][j];
        }
    }

    for (int i = 0; i < imageRows; i++) {
        for (int j = 0; j < transformCols; j++) {
            resultMatrix[i][j] = 0;
            for (int k = 0; k < imageCols; k++) {
                resultMatrix[i][j] += imageMatrix[i][k] * transformMatrix[k][j];
            }
        }
    }

    cout << "\nThe transformed image matrix is: " << endl;
    for (int i = 0; i < imageRows; i++) {
        for (int j = 0; j < transformCols; j++) {
            cout << resultMatrix[i][j] << " ";
        }
        cout << endl;
    }

    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int rows, cols;
    cout << "Enter the number of rows and columns for the castle: ";
    cin >> rows >> cols;

    int castle[50][50];
    bool visited[50][50] = {false};

    cout << "Enter the security layout of the rooms (0 for unlocked, 1 for locked): \n";
    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < cols; j++) {
            cin >> castle[i][j];
        }
    }

    int maxArea = 0;

    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < cols; j++) {
            if(castle[i][j] == 0 && !visited[i][j]) { 
                int area = 0;
                int stack[rows * cols][2]; 
                int top = -1;
                
                stack[++top][0] = i;
                stack[top][1] = j;
                visited[i][j] = true;

                int directions[4][2] = {{0, 1}, {1, 0}, {0, -1}, {-1, 0}};
                
                while(top >= 0) {
                    int x = stack[top][0];
                    int y = stack[top--][1];
                    area++;
                    
                    for(int d = 0; d < 4; d++) {
                        int nx = x + directions[d][0];
                        int ny = y + directions[d][1];
                        
                        if(nx >= 0 && nx < rows && ny >= 0 && ny < cols && castle[nx][ny] == 0 && !visited[nx][ny]) {
                            visited[nx][ny] = true;
                            stack[++top][0] = nx;
                            stack[top][1] = ny;
                        }
                    }
                }
                if(area > maxArea) {
                    maxArea = area;
                }
            }
        }
    }

    cout << "The largest contiguous region of unlocked rooms has an area of: " << maxArea << endl;
    return 0;
}

#include <iostream>
using namespace std;

int main() {
    int matches, players;

    cout << "Enter the number of matches: ";
    cin >> matches;
    cout << "Enter the number of players: ";
    cin >> players;

    int performanceMatrix[players][matches * 3];

    for (int i = 0; i < players; i++) {
        cout << "Enter data for Player " << i + 1 << ":\n";
        for (int j = 0; j < matches; j++) {
            cout << "Match " << j + 1 << " - Runs: ";
            cin >> performanceMatrix[i][j * 3]; 
            cout << "Match " << j + 1 << " - Wickets: ";
            cin >> performanceMatrix[i][j * 3 + 1];
            cout << "Match " << j + 1 << " - Overs: ";
            cin >> performanceMatrix[i][j * 3 + 2];
        }
    }

    for (int i = 0; i < players; i++) {
        int totalRuns = 0, totalWickets = 0, totalOvers = 0;
        
        for (int j = 0; j < matches; j++) {
            totalRuns += performanceMatrix[i][j * 3];
            totalWickets += performanceMatrix[i][j * 3 + 1];
            totalOvers += performanceMatrix[i][j * 3 + 2];
        }

        double avgRuns = (double)totalRuns / matches;
        double avgWickets = (double)totalWickets / matches;
        double avgOvers = (double)totalOvers / matches;

        cout << "\nPlayer " << i + 1 << " Statistics:" << endl;
        cout << "Total Runs: " << totalRuns << endl;
        cout << "Total Wickets: " << totalWickets << endl;
        cout << "Total Overs: " << totalOvers << endl;
        cout << "Average Runs per match: " << avgRuns << endl;
        cout << "Average Wickets per match: " << avgWickets << endl;
        cout << "Average Overs per match: " << avgOvers << endl;
    }

    return 0;
}

#include <iostream>
#include <string>
using namespace std;

int main() {
    int students, subjects, choice;

    cout << "Enter number of students: ";
    cin >> students;
    cout << "Enter number of subjects: ";
    cin >> subjects;

    string studentNames[students];
    string subjectNames[subjects];

    cout << "\nEnter names of students:\n";
    for (int i = 0; i < students; i++) {
        cout << "Student " << (i + 1) << " name: ";
        cin >> studentNames[i];
    }

    cout << "\nEnter names of subjects:\n";
    for (int j = 0; j < subjects; j++) {
        cout << "Subject " << (j + 1) << " name: ";
        cin >> subjectNames[j];
    }

    int marks[students][subjects];

    do {
        cout << "\n--- Student Result Management System ---\n";
        cout << "1. Enter Students' Marks\n";
        cout << "2. Display All Marks\n";
        cout << "3. Calculate Total Marks and Percentage of Each Student\n";
        cout << "4. Subject-wise Average Marks\n";
        cout << "5. Student with Highest Total Marks\n";
        cout << "6. Most Difficult Subject (Most students below average)\n";
        cout << "7. Exit\n";
        cout << "Enter your choice: ";
        cin >> choice;

        if (choice == 1) {
            for (int i = 0; i < students; i++) {
                cout << "\nEnter marks for " << studentNames[i] << ":\n";
                for (int j = 0; j < subjects; j++) {
                    cout << subjectNames[j] << ": ";
                    cin >> marks[i][j];
                }
            }
        }
        else if (choice == 2) {
            cout << "\nStudent\\Subject\t";
            for (int j = 0; j < subjects; j++)
                cout << subjectNames[j] << "\t";
            cout << endl;

            for (int i = 0; i < students; i++) {
                cout << studentNames[i] << "\t\t";
                for (int j = 0; j < subjects; j++)
                    cout << marks[i][j] << "\t";
                cout << endl;
            }
        }
        else if (choice == 3) {
            cout << "\nTotal and Percentage of each student:\n";
            for (int i = 0; i < students; i++) {
                int total = 0;
                for (int j = 0; j < subjects; j++)
                    total += marks[i][j];
                double percent = (double)total / subjects;
                cout << studentNames[i] << ": Total = " << total << ", Percentage = " << percent << "%\n";
            }
        }
        else if (choice == 4) {
            cout << "\nSubject-wise average marks:\n";
            for (int j = 0; j < subjects; j++) {
                int subjectTotal = 0;
                for (int i = 0; i < students; i++)
                    subjectTotal += marks[i][j];
                double avg = (double)subjectTotal / students;
                cout << subjectNames[j] << ": Average = " << avg << endl;
            }
        }
        else if (choice == 5) {
            int highestTotal = -1, topStudent = -1;
            for (int i = 0; i < students; i++) {
                int total = 0;
                for (int j = 0; j < subjects; j++)
                    total += marks[i][j];
                if (total > highestTotal) {
                    highestTotal = total;
                    topStudent = i;
                }
            }
            cout << "\nHighest Scoring Student: " << studentNames[topStudent] << " with " << highestTotal << " marks.\n";
        }
        else if (choice == 6) {
            int difficultSubject = -1, maxBelowAvg = -1;
            for (int j = 0; j < subjects; j++) {
                int total = 0, countBelow = 0;
                for (int i = 0; i < students; i++)
                    total += marks[i][j];
                double avg = (double)total / students;
                for (int i = 0; i < students; i++)
                    if (marks[i][j] < avg)
                        countBelow++;
                if (countBelow > maxBelowAvg) {
                    maxBelowAvg = countBelow;
                    difficultSubject = j;
                }
            }
            cout << "\nMost difficult subject: " << subjectNames[difficultSubject]
                 << " (" << maxBelowAvg << " students below average)\n";
        }
        else if (choice == 7) {
            cout << "\nExiting program.\n";
        }
        else {
            cout << "Invalid choice! Please try again.\n";
        }

    } while (choice != 7);

    return 0;
}