foo.c: In function 'main':
foo.c:5:23: error: expected ';' before '\U0000ff1b'
    5 | printf("输入三个数字")；
      |                       ^~
      |                       ;
foo.c:9:7: error: 'o' undeclared (first use in this function)
    9 | for(j=o;j<3-i;j++)
      |       ^
foo.c:9:7: note: each undeclared identifier is reported only once for each function it appears in

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