View Compilation Error

0_0_20052466_31458.cpp: In function 'void init()':
0_0_20052466_31458.cpp:78:9: error: 'du' was not declared in this scope
     clr(du,0);
         ^
0_0_20052466_31458.cpp:25:27: note: in definition of macro 'clr'
 #define clr(_x,_y) memset(_x,_y,sizeof (_x))
                           ^