num.cpp:6:  public: should be indented +1 space inside class Num  [whitespace/indent] [3]
num.cpp:13:  You don't need a ; after a }  [readability/braces] [4]
num.cpp:7:  Constructors callable with one argument should be marked explicit.  [runtime/explicit] [5]
num.cpp:17:  You don't need a ; after a }  [readability/braces] [4]
num.cpp:18:  Line ends in whitespace.  Consider deleting these extra spaces.  [whitespace/end_of_line] [4]
num.cpp:3:  run/num.cpp should include its header file run/num.h  [build/include] [5]
num.cpp:21:  Could not find a newline character at the end of the file.  [whitespace/ending_newline] [5]
Done processing num.cpp
Total errors found: 7