View Compilation Error

0_0_23288089_9251.cpp: In function 'void FFT::fft(FFT::vir*, const int&)':
0_0_23288089_9251.cpp:55:36: error: expected '}' at end of input
     void fft(vir *a, const int &n) {
                                    ^
0_0_23288089_9251.cpp: At global scope:
0_0_23288089_9251.cpp:55:36: error: expected '}' at end of input