View Compilation Error

0_0_30808313_4166.cpp:3:21: error: 'a' does not name a type
 using namespace std;a
                     ^
0_0_30808313_4166.cpp:4:23: error: expected unqualified-id before ',' token
 long  hash[100010]={0},i;
                       ^
0_0_30808313_4166.cpp:4:25: error: expected constructor, destructor, or type conversion before ';' token
 long  hash[100010]={0},i;
                         ^
0_0_30808313_4166.cpp: In function 'void c(long int)':
0_0_30808313_4166.cpp:6:2: error: 'i' was not declared in this scope
  i=1;
  ^
0_0_30808313_4166.cpp:7:2: error: 'hash' was not declared in this scope
  hash[1]=1;
  ^