Arrays

Question 1: Write a c++ program to find the maximum and minimum numbers from the given array.
Code Solution:
#include <iostream>
using namespace std;

const int SIZE = 5;

int main() {
    int arr[SIZE];

    cout << "Enter " << SIZE << " numbers: ";
    for (int i = 0; i < SIZE; i++) {
        cin >> arr[i];
    }

    int maxNum = INT_MIN, minNum = INT_MAX;
    for (int i = 0; i < SIZE; i++) {
        if (arr[i] > maxNum) {
            maxNum = arr[i];
        }
        if (arr[i] < minNum) {
            minNum = arr[i];
        }
    }

    cout << "Maximum number: " << maxNum << endl;
    cout << "Minimum number: " << minNum << endl;

    return 0;
}
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Question 2: Write a c++ program to search for a given value from the given array.
Code Solution:
#include <iostream>
using namespace std;

const int SIZE = 5;

int main() {
    int arr[SIZE];

    cout << "Enter " << SIZE << " numbers: ";
    for (int i = 0; i < SIZE; i++) {
        cin >> arr[i];
    }

    int searchValue;
    cout << "Enter a value to search for: ";
    cin >> searchValue;

    bool found = false;
    for (int i = 0; i < SIZE; i++) {
        if (arr[i] == searchValue) {
            found = true;
            cout << "Value found at index " << i << endl;
        }
    }

    if (!found) {
        cout << "Value not found in array\n";
    }

    return 0;
}
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Question 3: Given an array, count numbers whose last element is 2, 3, or 9.
Code Solution:
#include <iostream>
using namespace std;

const int SIZE = 7;

int main() {
    int arr[SIZE] = { 12, 23, 32, 41, 59, 68, 79 };

    int count = 0;
    for (int i = 0; i < SIZE; i++) {
        int lastDigit = arr[i] % 10;
        if (lastDigit == 2 || lastDigit == 3 || lastDigit == 9) {
            count++;
        }
    }

    cout << "Count of numbers whose last digit is 2, 3, or 9: " << count << endl;

    return 0;
}
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Question 4: Write a program to input two matrices and check whether they are equal.
Code Solution:
#include <iostream>
using namespace std;

const int ROWS = 5;
const int COLS = 5;

int main() {
    int mat1[ROWS][COLS];
    int mat2[ROWS][COLS];

    cout << "Enter " << ROWS*COLS << " elements of matrix 1: " << endl;
    for (int i = 0; i < ROWS; i++) {
        for (int j = 0; j < COLS; j++) {
            cin >> mat1[i][j];
        }
    }

    cout << "Enter " << ROWS*COLS << " elements of matrix 2: " << endl;
    for (int i = 0; i < ROWS; i++) {
        for (int j = 0; j < COLS; j++) {
            cin >> mat2[i][j];
        }
    }

    bool equal = true;
    for (int i = 0; i < ROWS; i++) {
        for (int j = 0; j < COLS; j++) {
            if (mat1[i][j] != mat2[i][j]) {
                equal = false;
                break;
            }
        }
        if (!equal) {
            break;
        }
    }

    if (equal) {
        cout << "Matrices are equal" << endl;
    } else {
        cout << "Matrices are not equal" << endl;
    }

    return 0;
}
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Question 5: Write a program to find the position of an element in a 2d array.
Code Solution:
#include <iostream>
using namespace std;

const int ROWS = 5;
const int COLS = 5;

int main() {
    int arr[ROWS][COLS];

    cout << "Enter " << ROWS*COLS << " elements of matrix: " << endl;
    for (int i = 0; i < ROWS; i++) {
        for (int j = 0; j < COLS; j++) {
            cin >> arr[i][j];
        }
    }

    int searchValue;
    cout << "Enter a value to search for: ";
    cin >> searchValue;

    bool found = false;
    int row, col;
    for (int i = 0; i < ROWS; i++) {
        for (int j = 0; j < COLS; j++) {
            if (arr[i][j] == searchValue) {
                found = true;
                row = i;
                col = j;
                break;
            }
        }
        if (found) {
            break;
        }
    }

    if (found) {
        cout << "Value found at position (" << row << ", " << col << ")" << endl;
    } else {
        cout << "Value not found in array" << endl;
    }

    return 0;
}
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Question 6: Write a program to print sum of the first row and last row separately.
Code Solution: 
#include <iostream>
using namespace std;

const int ROWS = 5;
const int COLS = 5;

int main() {
    int arr[ROWS][COLS];

    cout << "Enter " << ROWS*COLS << " elements of matrix: " << endl;
    for (int i = 0; i < ROWS; i++) {
        for (int j = 0; j < COLS; j++) {
            cin >> arr[i][j];
        }
    }

    int sumFirstRow = 0;
    for (int j = 0; j < COLS; j++) {
        sumFirstRow += arr[0][j];
    }

    int sumLastRow = 0;
    for (int j = 0; j < COLS; j++) {
        sumLastRow += arr[ROWS-1][j];
    }

    cout << "Sum of first row: " << sumFirstRow << endl;
    cout << "Sum of last row: " << sumLastRow << endl;

    return 0;
}
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