foo.c:10:6: warning: return type of 'main' is not 'int' [-Wmain]
   10 | void main()
      |      ^~~~
foo.c: In function 'main':
foo.c:24:9: warning: 'return' with a value, in function returning void [-Wreturn-type]
   24 |  return 0;
      |         ^
foo.c:10:6: note: declared here
   10 | void main()
      |      ^~~~
foo.c:14:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   14 |  scanf("%d%d",&m,&n);//ab数组个数
      |  ^~~~~~~~~~~~~~~~~~~
foo.c:16:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   16 |  scanf("%d",a+i);//a数组
      |  ^~~~~~~~~~~~~~~
foo.c:18:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   18 |  scanf("%d",b+i);//b数组
      |  ^~~~~~~~~~~~~~~

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