Create a vector of vectors, the inner vectors contain strings

cpsc120_2D_vector_pt2.cpp

// Gist https://gist.github.com/mshafae/759d0d17b0bb03873516dcc9e16f5dca
// Filename cpsc120_2D_vector_pt2.cpp
// CompileCommand clang++ -std=c++17 cpsc120_2D_vector_pt2.cpp 
// Create a vector of vectors, the inner vectors contain strings
// Note that C++ is row major order.

#include <iostream>
#include <string>
#include <vector>

int main(int argc, char const *argv[]) {
  std::vector<std::string> arguments{argv, argv + argc};
  // Vectors are row major order like a movie theater. This means the first
  // index is the row and the second index is the column (or seat). All the
  // types must be the same in an vector. This is a declaration for a 2 x 3
  // vector - 2 rows, 3 columns. Notice the double braces.
  // The table below looks like this:
  // | "Pastrami on Rye" | "YES" |
  // | "Hot Dog"         | "YES" |
  // | "Burrito"         | "NO"  |
  
  std::vector<std::vector<std::string>> sandwiches{
    {"Pastrami on Rye", "YES"},
    {"Hot Dog", "YES"},
    {"Burrito", "NO"}
  };
  if (arguments.size() < 2) {
    std::cout << "Please provide a sandwich name on the command line.\n";
    std::cout << "For example: ./a.out \"Pastrami on Rye\"\n";
    std::cout << "Exiting.\n";
    return 1;
  }
  bool index{0};
  bool was_found{false};
  bool is_sandwich{false};
  // Search for the sandwich passed on the command line
  // auto is replaced with std::vector<std::string> by the compiler
  for (const auto& element : sandwiches) {
    // Each element is a pair. Location 0 has the sandwich name and locaiton 1
    // has the Yes or No.
    if (element.at(0) == arguments.at(1)) {
      was_found = true;
      is_sandwich = (element.at(1) == "YES");
      break;
    }
    index = index + 1;
  }
  if (was_found && is_sandwich) {
    std::cout << sandwiches.at(index).at(0) << " is considered a sandwich.\n";
  } else if (was_found && !is_sandwich) {
    std::cout << sandwiches.at(index).at(0)
              << " is NOT considered a sandwich.\n";
  } else {
    std::cout << "Sorry, I don't know about \"" << arguments.at(1) << "\"\n";
    std::cout << "I can't tell you if it is a sandwich or not.\n";
    std::cout << "Exiting.\n";
    return 1;
  }
  return 0;
}