View Compilation Error

0_0_28689290_3000.cpp:9:9: error: stray '\243' in program
         a[i] = a[i - 1] + 1.0 / (i * 2）;
         ^
0_0_28689290_3000.cpp:9:9: error: stray '\251' in program
0_0_28689290_3000.cpp: In function 'int main()':
0_0_28689290_3000.cpp:9:41: error: expected ')' before ';' token
         a[i] = a[i - 1] + 1.0 / (i * 2）;
                                         ^