vectors.cpp

This example shows how to print vectors and matrices, and how to remove elements

// ===========================================================
// Example code: how to print std::vectors and remove elements
// ===========================================================
 
#include "Kernel.h"
 
int main () {
 
  try {
 
    // define three std::vectors
    std::vector<double> v1 {1, 2, 3, 4, 5}, v2 {2, 3, 4}, v3 {3, 4, 5, 6};
  
    // print the std::vectors
    std::cout << std::endl << " std::vector v1: " << std::endl;
    cbl::Print(v1); 
    std::cout << std::endl << " std::vector v2: " << std::endl;
    cbl::Print(v2); 
    std::cout << std::endl << " std::vector v3: " << std::endl;
    cbl::Print(v3); 
 
    // erase three lines of std::vector v1 and show the result
    std::vector<int> lines0 {0, 3, 1};
    cbl::Erase(v1, lines0); 
    std::cout << std::endl << " std::vector v1 without the lines 0, 1, 3: " << std::endl;
    cbl::Print(v1); 
  
    // define a matrix
    std::vector<std::vector<double>> Mat {v1, v2, v3};
 
    // print the matrix
    std::cout << std::endl << " matrix Mat: " << std::endl;
    cbl::Print(Mat); 
 
    // erase two lines of the matrix and show the result
    std::vector<int> lines {2, 0};
    cbl::Erase_lines(Mat, lines);
    std::cout << std::endl << " matrix Mat without the lines 0 and 2: " << std::endl;
    cbl::Print(Mat);
 
    // erase two columns of the matrix and show the result
    std::vector<int> columns {0, 1};
    cbl::Erase_columns(Mat, columns); 
    std::cout << std::endl << " matrix Mat without the columns 0 and 1: " << std::endl;
    cbl::Print(Mat);
 
  }
 
  catch(cbl::glob::Exception &exc) { std::cerr << exc.what() << std::endl; exit(1); }
 
  return 0;
}