Added C++ compilation (algorithm-archivists#939)

SConstruct

@@ -16,12 +16,15 @@ env['CC'] = 'gcc'
 for tool in ['gcc','gnulink']:
    env.Tool(tool)
 env['CCFLAGS'] = ''
+env['CXXFLAGS'] = '-std=c++17'
 
 # Add other languages here when you want to add language targets
 # Put 'name_of_language_directory' : 'file_extension'
-languages = {'c': 'c'}
+languages = {'c': 'c', 'cpp': 'cpp'}
 
 env.C = env.Program
+env.CPlusPlus = env.Program
+
 
 Export('env')
 

contents/split-operator_method/code/cpp/SConscript

@@ -0,0 +1,6 @@
+Import('*')
+from pathlib import Path
+
+dirname = Path.cwd().parents[1].stem
+
+env.CPlusPlus(f'#/build/cpp/{dirname}', Glob('*.cpp'), LIBS=['m', 'fftw3'])

sconscripts/cpp_SConscript

@@ -0,0 +1,6 @@
+Import('files_to_compile env')
+from pathlib import Path
+
+for file in files_to_compile:
+    chapter_name = file.parent.parent.parent.stem
+    env.CPlusPlus(f'#/build/cpp/{chapter_name}', str(file))