View Compilation Error

0_0_19445428_32107.cpp: In member function 'bool cmp::operator()(int, int)':
0_0_19445428_32107.cpp:11:57: error: expected ';' before '}' token
 struct cmp{bool operator()(int i,int j){return a[i]<a[j]}};cmp x;
                                                         ^