View Compilation Error

0_0_15497783_8371.cpp:32:13: error: stray '\243' in program
             double tt=fabs((a[i].y-a[i-1].y)）/fabs（(a[i].x-a[i-1].x));
             ^
0_0_15497783_8371.cpp:32:13: error: stray '\251' in program
0_0_15497783_8371.cpp:32:13: error: stray '\243' in program
0_0_15497783_8371.cpp:32:13: error: stray '\250' in program