View Compilation Error

0_0_34690646_28324.cpp: In function 'int main()':
0_0_34690646_28324.cpp:12:3: error: 'n' was not declared in this scope
   n=strlen(a);
   ^
0_0_34690646_28324.cpp:19:1: error: expected '}' at end of input
 }
 ^