View Compilation Error

0_0_30152472_3617.cpp: In function 'bool cmp(str, str)':
0_0_30152472_3617.cpp:17:21: error: expected primary-expression at end of input
  return a.a*(b.a+b.b%
                     ^
0_0_30152472_3617.cpp:17:21: error: expected ')' at end of input
0_0_30152472_3617.cpp:17:21: error: expected ';' at end of input
0_0_30152472_3617.cpp:17:21: error: expected '}' at end of input