diff options
Diffstat (limited to 'doc/special_examples/Tutorial_sparse_example.cpp')
| -rw-r--r-- | doc/special_examples/Tutorial_sparse_example.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/special_examples/Tutorial_sparse_example.cpp b/doc/special_examples/Tutorial_sparse_example.cpp index 89937b411..8850db052 100644 --- a/doc/special_examples/Tutorial_sparse_example.cpp +++ b/doc/special_examples/Tutorial_sparse_example.cpp @@ -1,5 +1,6 @@ #include <Eigen/Sparse> #include <vector> +#include <iostream> typedef Eigen::SparseMatrix<double> SpMat; // declares a column-major sparse matrix type of double typedef Eigen::Triplet<double> T; @@ -9,7 +10,10 @@ void saveAsBitmap(const Eigen::VectorXd& x, int n, const char* filename); int main(int argc, char** argv) { - assert(argc==2); + if(argc!=2) { + std::cerr << "Error: expected one and only one argument.\n"; + return -1; + } int n = 300; // size of the image int m = n*n; // number of unknowns (=number of pixels) |