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ch-05-ex-06-solution.cpp
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Tue, Feb 25, 02:03

ch-05-ex-06-solution.cpp
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/*
* chapter-05-exercise-06.cpp
*
* Modification of previous exercise: this time it performs M x v, v x M,
* s * M, M * s, with M(nxm), v(n), s
*
* - run the exercise as: ./ch-05-ex-05-solutions A.dat v1.dat v2.dat s
*
* Created on: Oct 8, 2012
* Author: Radu Popescu <radu.popescu@epfl.ch>
*/
#include <cassert>
#include <cstdlib>
#include <iostream>
#include <fstream>
#include "ArrayUtil.hpp"
int main(int argc, char* argv[])
{
if (argc != 5) {
std::cout << "Missing arguments. Please run the exercise as:\n"
<< " ./ch-05-ex-05-solutions A.dat v1.dat v2.dat s"
<< std::endl;
return -1;
}
const char* file_name_A = argv[1];
const char* file_name_v1 = argv[2];
const char* file_name_v2 = argv[3];
const double s = atoi(argv[4]);
double** A;
double *v1;
double *v2;
int m, n;
Read(file_name_A, A, m, n);
Read(file_name_v1, v1, m);
Read(file_name_v2, v2, n);
double* w1;
Allocate(w1, n);
Multiply(v1, A, m, n, w1);
double* w2;
Allocate(w2, m);
Multiply(A, v2, m, n, w2);
double** B;
Allocate(B, m, n);
Multiply(A, s, m, n, B);
std::cout << "Matrix A: " << std::endl;
Print(A, m, n, std::cout);
std::cout << "Vector v1: " << std::endl;
Print(v1, m, std::cout, false);
std::cout << "Vector v2: " << std::endl;
Print(v2, n, std::cout, true);
std::cout << "Vector w1 = v1 * A: " << std::endl;
Print(w1, n, std::cout, false);
std::cout << "Vector w2 = A * v2: " << std::endl;
Print(w2, m, std::cout, true);
std::cout << "s = " << s << std::endl;
std::cout << "Matrix B = s * A: " << std::endl;
Print(B, m, n, std::cout);
Delete(A, m);
Delete(B, n);
Delete(v1);
Delete(v2);
Delete(w1);
Delete(w2);
return 0;
}

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