View Compilation Error

0_0_33604169_27753.cpp: In function 'int main()':
0_0_33604169_27753.cpp:86:13: error: 'w' was not declared in this scope
         clr(w);//每个案列都要重新置0；
             ^
0_0_33604169_27753.cpp:4:23: note: in definition of macro 'clr'
 #define clr(x) memset(x,0,sizeof(x))
                       ^