foo.c: In function 'main':
foo.c:6:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10000]' [-Wformat=]
  scanf("%s",&a);
          ^
foo.c:7:9: warning: array subscript has type 'char' [-Wchar-subscripts]
  while(a[i]!='\0'){
         ^
foo.c:8:16: warning: array subscript has type 'char' [-Wchar-subscripts]
   printf("%c",a[i]);
                ^

自豪的采用jd5进行评测(github.com/masnn/jd5)