/in/foo.c: In function 'main':
/in/foo.c:13:16: error: 'temp\U0000ff01' undeclared (first use in this function); did you mean 'temp'?
   13 |         }while(temp！=0);
      |                ^~~~~~
      |                temp
/in/foo.c:13:16: note: each undeclared identifier is reported only once for each function it appears in