Main.c: In function 'main':
Main.c:28:17: error: 'n' undeclared (first use in this function)
   28 |     scanf("%d",&n);
      |                 ^
Main.c:28:17: note: each undeclared identifier is reported only once for each function it appears in
Main.c:30:17: error: 'mon' undeclared (first use in this function)
   30 |     scanf("%d",&mon);
      |                 ^~~
Main.c:39:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'double' [-Wformat=]
   39 |     printf("%d",fmin(sum1,sum2));
      |             ~^  ~~~~~~~~~~~~~~~
      |              |  |
      |              |  double
      |              int
      |             %f
Main.c:27:9: warning: unused variable 'n\U0000ff0cmon' [-Wunused-variable]
   27 |     int n，mon,sum1=5,sum2=0;
      |         ^~~~~~