View Compilation Error

0_0_30837338_18088.cpp: In function 'int main()':
0_0_30837338_18088.cpp:148:3: error: 'idx' was not declared in this scope
   idx = 0;
   ^
0_0_30837338_18088.cpp:150:7: error: 'dfn' was not declared in this scope
   mem(dfn, 0);
       ^
0_0_30837338_18088.cpp:5:26: note: in definition of macro 'mem'
 #define mem(x,y) memset((x),(y),sizeof(x))
                          ^