foo.c: In function 'FindMaxNeg':
foo.c:28:4: error: 'fsa' undeclared (first use in this function); did you mean 'csa'?
   28 |    fsa=a[i];
      |    ^~~
      |    csa
foo.c:28:4: note: each undeclared identifier is reported only once for each function it appears in
foo.c:35:1: warning: control reaches end of non-void function [-Wreturn-type]
   35 | }
      | ^
foo.c: In function 'main':
foo.c:40:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   40 |  scanf("%d",&n1);
      |  ^~~~~~~~~~~~~~~
foo.c:41:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   41 |  scanf("%d",&n2);
      |  ^~~~~~~~~~~~~~~
foo.c:45:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   45 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:47:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   47 |   scanf("%d",&b[i]);
      |   ^~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务