View Compilation Error

0_0_38508497_14669.cpp: In function 'int main()':
0_0_38508497_14669.cpp:7:4: error: expected unqualified-id before '=' token
  ll=c;
    ^
0_0_38508497_14669.cpp:9:8: error: 'n' was not declared in this scope
   cin>>n;
        ^
0_0_38508497_14669.cpp:11:4: error: 'c' was not declared in this scope
    c=1ll+a+b;
    ^