foo.cc:8:20: error: stray '\357' in program
    8 |  if(n < 3) sum = 10；
      |                    ^
foo.cc:8:21: error: stray '\274' in program
    8 |  if(n < 3) sum = 10；
      |                     ^
foo.cc:8:22: error: stray '\233' in program
    8 |  if(n < 3) sum = 10；
      |                      ^
foo.cc: In function 'int main()':
foo.cc:8:20: error: expected ';' before 'if'
    8 |  if(n < 3) sum = 10；
      |                    ^
      |                    ;
    9 |  if(n >= 3 && n < 10) sum = (n - 3) * 2.5;
      |  ~~                 
foo.cc:11:21: error: expected ';' before 'return'
   11 |  printf("%.2f", sum)
      |                     ^
      |                     ;
   12 |     return 0;
      |     ~~~~~~           

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