Matrix Vector Operations in C++

Description

This project demonstrates basic operations on a 2D matrix using vectors in C++. The main functionalities include creating a matrix based on user input, displaying the matrix, and modifying the matrix values. The project is suitable for beginners learning about dynamic data structures and input/output operations in C++.

Features

Dynamic matrix creation based on user input for rows and columns.
Input values for each element of the matrix.
Display the initial matrix.
Modify the matrix elements based on new user input.
Display the modified matrix.

Code Snippets

Matrix Creation and Initial Display:

#include <iostream>
#include <vector>

int main() {
    int fil, col;
    int val = 0;
    std::vector< std::vector<int> > matriz;

    std::cout << "FILAS: ";
    std::cin >> fil;
    std::cout << "COLUMNAS: ";
    std::cin >> col;

    for (int i = 0; i < fil; i++) {
        std::vector<int> v1;
        for (int j = 0; j < col; j++) {
            std::cout << "Valor [" << i << "][" << j << "] = ";
            std::cin >> val;
            v1.push_back(val);
        }
        matriz.push_back(v1);
    }

    for (int i = 0; i < matriz.size(); i++) {
        for (int j = 0; j < matriz[i].size(); j++) {
            std::cout << matriz[i][j] << " ";
        }
        std::cout << std::endl;
    }

    system("pause");
}

Matrix Modification and Display:

    std::cout << "\nALTERANDO LOS ELEMENTOS!!!" << std::endl;
    int nuevos;
    for (int i = 0; i < fil; i++) {
        for (int j = 0; j < col; j++) {
            std::cout << "Valor [" << i << "][" << j << "] = ";
            std::cin >> nuevos;
            matriz[i][j] = nuevos;
        }
    }

    for (int i = 0; i < matriz.size(); i++) {
        for (int j = 0; j < matriz[i].size(); j++) {
            std::cout << matriz[i][j] << " ";
        }
        std::cout << std::endl;
    }

    system("pause");
}

How to Run

Compile the code using a C++ compiler, e.g., g++ -o matrix matrix_vector_ops.cpp.
Run the executable, e.g., ./matrix.
Follow the on-screen prompts to input the matrix dimensions and values.
View the initial matrix.
Modify the matrix values as prompted and view the updated matrix.

Requirements