View Compilation Error

0_0_17584907_24583.c:5:17: error: expected identifier or '(' before '/' token
 int n,m,f[N][3];//0:ok 1:6- 2:wrong
                 ^
0_0_17584907_24583.c: In function 'calc':
0_0_17584907_24583.c:16:33: error: expected expression before '/' token
  int i,res=c,flag=0,len=0,t1,t0;//flag_wa 
                                 ^
0_0_17584907_24583.c:19:3: error: 'bits' undeclared (first use in this function)
   bits[++len]=c%10;
   ^
0_0_17584907_24583.c:19:3: note: each undeclared identifier is reported only once for each function it appears in