// file: $(LAB 07)/mread.cc
//
// this program demonstrates how to read a matrix as a vector
// of vectors. each rows of the matrix can have a different size.
//

// modified:
//  20181116 (JP): initial version
//

// local include files
//
#include "Matrix.h"

// synopsis:
//
//  mread.exe <filename>
//
//   <filename>: the name of the file to read
//
// examples:
//
//  mread.exe m1.txt
//

//=============================================================================
// function: main
//
int main(int argc, char** argv) {

  // open the input file for reading
  //
  FILE* fp = fopen(argv[1], "r");

  if (fp == (FILE*)NULL) {
    fprintf(stdout, "%s: error opening file (%s)\n", argv[0], argv[1]);
    return(-1);
  }

  // load the matrix into our structure
  //
  MATRIX mat;

  if (load(mat, fp) == false) {
    fprintf(stdout, "%s: error reading matrix (%s)\n", argv[0], argv[1]);
    return(-1);
  }

  // display the matrix
  //
  if (display(stdout, mat, (char*)"matrix:") == false) {
    fprintf(stdout, "%s: error displaying matrix (%s)\n", argv[0], argv[1]);
    return(-1);
  }

  // close the file
  //
  fclose(fp);

  // exit gracefully
  //
  return(0);
}