diff options
Diffstat (limited to 'doc/special_examples')
| -rw-r--r-- | doc/special_examples/CMakeLists.txt | 5 | ||||
| -rw-r--r-- | doc/special_examples/Tutorial_sparse_example.cpp | 8 |
2 files changed, 8 insertions, 5 deletions
diff --git a/doc/special_examples/CMakeLists.txt b/doc/special_examples/CMakeLists.txt index 101fbc5f9..5b00e8b1a 100644 --- a/doc/special_examples/CMakeLists.txt +++ b/doc/special_examples/CMakeLists.txt @@ -3,7 +3,7 @@ if(NOT EIGEN_TEST_NOQT) if(QT4_FOUND) include(${QT_USE_FILE}) endif() -endif(NOT EIGEN_TEST_NOQT) +endif() if(QT4_FOUND) add_executable(Tutorial_sparse_example Tutorial_sparse_example.cpp Tutorial_sparse_example_details.cpp) @@ -17,9 +17,8 @@ if(QT4_FOUND) ) add_dependencies(all_examples Tutorial_sparse_example) -endif(QT4_FOUND) +endif() -check_cxx_compiler_flag("-std=c++11" EIGEN_COMPILER_SUPPORT_CPP11) if(EIGEN_COMPILER_SUPPORT_CPP11) add_executable(random_cpp11 random_cpp11.cpp) target_link_libraries(random_cpp11 ${EIGEN_STANDARD_LIBRARIES_TO_LINK_TO}) diff --git a/doc/special_examples/Tutorial_sparse_example.cpp b/doc/special_examples/Tutorial_sparse_example.cpp index 830e196ea..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; @@ -9,10 +10,13 @@ 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 unknows (=number of pixels) + int m = n*n; // number of unknowns (=number of pixels) // Assembly: std::vector<T> coefficients; // list of non-zeros coefficients |