foo.c:2:6: warning: return type of 'main' is not 'int' [-Wmain]
 void main()
      ^~~~
foo.c: In function 'main':
foo.c:11:3: warning: statement with no effect [-Wunused-value]
   for (min;min<=max;min++)
   ^~~
foo.c:18:3: warning: statement with no effect [-Wunused-value]
   for (min;min<=max;min++)
   ^~~
foo.c:5:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&min,&max);
  ^~~~~~~~~~~~~~~~~~~~~~~~

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