Example: Transpose Matrix Without Function in C++

// Transpose Matrix Without Function
#include <iostream>
using namespace std;

int main() {
    // Step 1: Declare dimensions and matrices
    int rows, cols;

    cout << "Enter number of rows: ";
    cin >> rows;
    cout << "Enter number of columns: ";
    cin >> cols;

    int matrix[rows][cols]; // Original matrix
    int transpose[cols][rows]; // Transposed matrix

    // Step 2: Input elements into the original matrix
    cout << "Enter elements of the matrix:" << endl;
    for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
            cout << "Enter element matrix[" << i << "][" << j << "]: ";
            cin >> matrix[i][j];
        }
    }

    // Step 3: Print the original matrix (optional, for verification)
    cout << "\nOriginal Matrix:" << endl;
    for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
            cout << matrix[i][j] << " ";
        }
        cout << endl;
    }

    // Step 4: Compute the transpose
    // The element at matrix[i][j] goes to transpose[j][i]
    for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
            transpose[j][i] = matrix[i][j];
        }
    }

    // Step 5: Print the transposed matrix
    cout << "\nTransposed Matrix:" << endl;
    for (int i = 0; i < cols; ++i) { // Note: iterate up to cols for rows here
        for (int j = 0; j < rows; ++j) { // Note: iterate up to rows for columns here
            cout << transpose[i][j] << " ";
        }
        cout << endl;
    }

    return 0;
}