ch-05-ex-05-solution.cpp
ff33b55a3eedmaster

ch-05-ex-05-solution.cpp
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			/*
			* chapter-05-exercise-05.cpp
			*
			* Matrix multiply of A(n x m) and B (p x q)
			* - matrices are each read from a text file passed as a command line parameter
			* - the file has the following format:
			* - first line n_rows n_cols
			* - following lines are the elements of the matrix
			* example:
			* 4 3
			* 1 2 3
			* 4 5 6
			* 7 8 9
			* 10 11 12
			*
			* - run the exercise as: ./ch-05-ex-05-solutions A.dat B.dat
			*
			* Created on: Oct 8, 2012
			* Author: Radu Popescu <radu.popescu@epfl.ch>
			*/

			#include <cassert>
			#include <fstream>
			#include <iostream>

			#include "ArrayUtil.hpp"

			int main(int argc, char *argv[]) {
			if (argc != 3) {
			std::cout << "Missing arguments. Please run the exercise as:\n"
			<< " ./ch-05-ex-05-solutions A.dat B.dat" << std::endl;
			return -1;
			}

			const char *file_name_A = argv[1];
			const char *file_name_B = argv[2];

			double **A;
			double **B;
			int m, n, p, q;

			Read(file_name_A, A, m, n);
			Read(file_name_B, B, p, q);

			double **C;
			Allocate(C, m, q);

			Multiply(A, B, m, n, p, q, C);

			std::cout << "Matrix A: " << std::endl;
			Print(A, m, n, std::cout);
			std::cout << "Matrix B: " << std::endl;
			Print(B, p, q, std::cout);
			std::cout << "Matrix C = A * B: " << std::endl;
			Print(C, m, q, std::cout);

			Delete(A, m);
			Delete(B, n);
			Delete(C, m);

			return 0;
			}