/in/foo.cc: In function 'int win()':
/in/foo.cc:43:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j,m;
      ^
/in/foo.cc:43:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,m;
        ^
/in/foo.cc: In function 'int judge()':
/in/foo.cc:52:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j;
      ^
/in/foo.cc:52:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j;
        ^
/in/foo.cc:54:6: warning: unused variable 'w' [-Wunused-variable]
  int w=8;
      ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:121:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j;
        ^