foo.cc:13:7: error: stray '\357' in program
     if（max<=c)
       ^
foo.cc:13:8: error: stray '\274' in program
     if（max<=c)
        ^
foo.cc:13:9: error: stray '\210' in program
     if（max<=c)
         ^
foo.cc: In function 'int main()':
foo.cc:11:9: warning: statement has no effect [-Wunused-value]
      max+b;
      ~~~^~
foo.cc:13:10: error: expected '(' before 'max'
     if（max<=c)
          ^~~

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