/in/foo.cc:10:13: error: stray '\357' in program
 float ii=i-m；
             ^
/in/foo.cc:10:14: error: stray '\274' in program
 float ii=i-m；
              ^
/in/foo.cc:10:15: error: stray '\233' in program
 float ii=i-m；
               ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:11:1: error: expected ',' or ';' before 'float'
 float mm=k*(i-m);
 ^~~~~
/in/foo.cc:15:23: error: 'mm' was not declared in this scope
 printf("%.2lf\n", abs(mm));
                       ^~
/in/foo.cc:10:7: warning: unused variable 'ii' [-Wunused-variable]
 float ii=i-m；
       ^~