View Compilation Error

0_0_34157419_21902.cpp:5:2: error: stray '\243' in program
  double r，V;
  ^
0_0_34157419_21902.cpp:5:2: error: stray '\254' in program
0_0_34157419_21902.cpp: In function 'int main()':
0_0_34157419_21902.cpp:5:12: error: expected initializer before 'V'
  double r，V;
            ^
0_0_34157419_21902.cpp:6:21: error: 'r' was not declared in this scope
  while(scanf("%lf",&r)!=EOF)
                     ^
0_0_34157419_21902.cpp:9:3: error: 'V' was not declared in this scope
   V=(4.0/3)*r*r*r*PI;
   ^