foo.c:2:1: error: unknown type name 'nt'; did you mean 'int'?
 nt main()//递归求数组最大值
 ^~
 int
foo.c: In function 'main':
foo.c:5:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&n);
    ^~~~~~~~~~~~~~
foo.c: In function 'shuru':
foo.c:18:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
         ^~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务