View Compilation Error

0_0_29100605_4303.cpp: In function 'void init()':
0_0_29100605_4303.cpp:40:9: error: 'num' was not declared in this scope
     CLR(num,0);
         ^
0_0_29100605_4303.cpp:16:26: note: in definition of macro 'CLR'
 #define CLR(A,v)  memset(A,v,sizeof A)
                          ^