foo.c: In function 'main':
foo.c:5:22: error: expected ';' before 'm'
    5 | scanf("%d%d",&n1,&n2)
      |                      ^
      |                      ;
    6 | m=n1;
      | ~                     
foo.c:14:24: error: 'ni' undeclared (first use in this function); did you mean 'n2'?
   14 | printf("最大公约数:%d",ni);
      |                        ^~
      |                        n2
foo.c:14:24: note: each undeclared identifier is reported only once for each function it appears in

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