View Compilation Error

0_0_18830900_5987.cpp: In function 'double sector_area(const point&, const point&)':
0_0_18830900_5987.cpp:103:29: error: expected primary-expression at end of input
     while(theta <= 0) theta += 
                             ^
0_0_18830900_5987.cpp:103:29: error: expected '}' at end of input