View Compilation Error

0_0_33852887_1046.cpp:31:17: error: expected ')' before 'a'
 bool ( meassage a , meassage b ){
                 ^
0_0_33852887_1046.cpp: In function 'int main()':
0_0_33852887_1046.cpp:109:30: error: 'cmp' was not declared in this scope
         sort(mea , mea + m , cmp) ;
                              ^