View Compilation Error

0_0_15931324_378.cpp:4:6: error: stray '\243' in program
      double a,b；
      ^
0_0_15931324_378.cpp:4:6: error: stray '\273' in program
0_0_15931324_378.cpp:8:6: error: stray '\243' in program
      b=a；
      ^
0_0_15931324_378.cpp:8:6: error: stray '\273' in program
0_0_15931324_378.cpp:11:6: error: stray '\243' in program
      printf("%.2lf\n",b)；
      ^
0_0_15931324_378.cpp:11:6: error: stray '\273' in program
0_0_15931324_378.cpp: In function 'int main()':
0_0_15931324_378.cpp:5:6: error: expected initializer before 'while'
      while(scanf("%lf",&a)!=EOF)
      ^