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	tcpp-armadillo.cpp - numeric - C++ library with numerical algorithms
	git clone git://src.adamsgaard.dk/numeric
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	tcpp-armadillo.cpp (548B)
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	1 #include <iostream>
	2 #include <cstdlib>
	3 #include <armadillo>
	4
	5 int main(int argc, char* argv[])
	6 {
	7 using std::cout;
	8
	9 unsigned int N, i, j;
	10
	11 if (argc == 2) {
	12 N = atoi(argv[1]);
	13 } else {
	14 std::cerr << "Sorry, I need matrix width as command line argumen…
	15 return 1;
	16 }
	17
	18 arma::mat A(N,N);
	19 arma::mat B(N,N);
	20 arma::mat C(N,N);
	21
	22 for (i = 0; i<N; ++i) {
	23 for (j = 0; j<N; ++j) {
	24 A(i,j) = 2.0;
	25 B(i,j) = (double) N*j + i;
	26 }
	27 }
	28
	29 C = A*B;
	30
	31 return 0;
	32 }