updated formatter settings

.clang-format

@@ -0,0 +1,2 @@
+# .clang-format
+IndentWidth: 4

CMakeLists.txt

@@ -1,39 +1,7 @@
-# cmake_minimum_required(VERSION 3.5.0)
-
-# set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
-
-# # set root of location to find PETSc's pkg-config
-# set(PETSC $ENV{PETSC_DIR}/$ENV{PETSC_ARCH})
-# set(ENV{PKG_CONFIG_PATH} ${PETSC}/lib/pkgconfig)
-
-# # Remove the lines below if you do not wish to have PETSc determine the compilers
-# execute_process ( COMMAND pkg-config PETSc --variable=ccompiler COMMAND tr -d '\n' OUTPUT_VARIABLE C_COMPILER)
-# SET(CMAKE_C_COMPILER ${C_COMPILER})
-# execute_process ( COMMAND pkg-config PETSc --variable=cxxcompiler COMMAND tr -d '\n' OUTPUT_VARIABLE CXX_COMPILER)
-# if (CXX_COMPILER)
-#   SET(CMAKE_CXX_COMPILER ${CXX_COMPILER})
-# endif (CXX_COMPILER)
-# execute_process ( COMMAND pkg-config PETSc --variable=fcompiler COMMAND tr -d '\n' OUTPUT_VARIABLE FORTRAN_COMPILER)
-# if (FORTRAN_COMPILER)
-#   SET(CMAKE_Fortran_COMPILER ${FORTRAN_COMPILER})
-#   enable_language(Fortran)
-# endif (FORTRAN_COMPILER)
-
-# #  tells CMake to build the application ex1 from the source file ex1.c
-# #  this must appear AFTER the compilers are set
-# project(main)
-# add_executable(main main.c)
-
-# find_package(MPI REQUIRED)
-# include_directories(${MPI_INCLUDE_PATH})
-
-# find_package(PkgConfig REQUIRED)
-# pkg_search_module(PETSC REQUIRED IMPORTED_TARGET PETSc)
-# target_link_libraries(main PkgConfig::PETSC)
-
 cmake_minimum_required(VERSION 3.5.0)
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 # Set root of location to find PETSc's pkg-config
 set(PETSC $ENV{PETSC_DIR}/$ENV{PETSC_ARCH})

main.c

@@ -47,24 +47,24 @@ int main(int argc, char **argv) {
 
     // A := diag(-1, 2, -1)
     for (PetscInt i = 0; i < n; i++) {
-    // PetscScalar v[3] = {-1.0, 2.0, -1.0};
-    // PetscInt col[3] = {i - 1, i, i + 1};
-    // PetscInt ncol = 0;
-    // if (i > 0) {
-    //   col[ncol] = i - 1;
-    //   v[ncol] = -1.0;
-    //   ncol++;
-    // }
-    // col[ncol] = i;
-    // v[ncol] = 2.0;
-    // ncol++;
-    // if (i < n - 1) {
-    //   col[ncol] = i + 1;
-    //   v[ncol] = -1.0;
-    //   ncol++;
-    // }
-    // MatSetValues(A, 1, &i, ncol, col, v, INSERT_VALUES);
-    MatSetValue(A, i, i, (PetscScalar)(i + 1), INSERT_VALUES);
+        PetscScalar v[3] = {-1.0, 2.0, -1.0};
+        PetscInt col[3] = {i - 1, i, i + 1};
+        PetscInt ncol = 0;
+        if (i > 0) {
+            col[ncol] = i - 1;
+            v[ncol] = -1.0;
+            ncol++;
+        }
+        col[ncol] = i;
+        v[ncol] = 2.0;
+        ncol++;
+        if (i < n - 1) {
+            col[ncol] = i + 1;
+            v[ncol] = -1.0;
+            ncol++;
+        }
+        MatSetValues(A, 1, &i, ncol, col, v, INSERT_VALUES);
+        // MatSetValue(A, i, i, (PetscScalar)(i + 1), INSERT_VALUES);
     }
 
     MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY);