View Compilation Error

0_0_34318107_25446.cpp:4:2: error: stray '\243' in program
  double a,b,c；
  ^
0_0_34318107_25446.cpp:4:2: error: stray '\273' in program
0_0_34318107_25446.cpp: In function 'int main()':
0_0_34318107_25446.cpp:5:2: error: expected initializer before 'int'
  int m,n;
  ^
0_0_34318107_25446.cpp:6:14: error: 'm' was not declared in this scope
  scanf("%d",&m);
              ^
0_0_34318107_25446.cpp:9:28: error: 'c' was not declared in this scope
   scanf("%lf%lf%lf",&a,&b,&c);
                            ^