9.1　図形を動かす

[Iwao@fedora C81]$ cd ../../C9/C91/
[Iwao@fedora C91]$ g++ c91.cpp -lglut -lGL -lGLU
c91.cpp: 関数 ‘void display()’ 内:
c91.cpp:46:17: エラー: expected unqualified-id before ‘,’ token
   46 |   ::glRotated(r.,0.,1.,0.) ;
      |                 ^
c91.cpp: 関数 ‘void resize(int, int)’ 内:
c91.cpp:64:17: エラー: ‘GL_PROGECTION’ was not declared in this scope; did you mean ‘GL_PROJECTION’?
   64 |  ::glMatrixMode(GL_PROGECTION) ;
      |                 ^~~~~~~~~~~~~
      |                 GL_PROJECTION
[Iwao@fedora C91]$ g++ c91.cpp -lglut -lGL -lGLU
[Iwao@fedora C91]$ ./a.out