View Compilation Error

0_0_30192015_18451.cpp:5:2: error: expected unqualified-id before ']' token
  ];
  ^
0_0_30192015_18451.cpp: In function 'int main()':
0_0_30192015_18451.cpp:9:17: error: 's' was not declared in this scope
      while(gets(s)){
                 ^
0_0_30192015_18451.cpp:11:14: error: 'i' was not declared in this scope
          ; s[i] != '\0'; ++i){
              ^