/in/foo.c: In function 'main':
/in/foo.c:28:6: error: 'max' undeclared (first use in this function)
   if(max < sumBUD)
      ^~~
/in/foo.c:28:6: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:31:13: warning: implicit declaration of function 'strcpy' [-Wimplicit-function-declaration]
             strcpy(Name,i);
             ^~~~~~
/in/foo.c:31:13: warning: incompatible implicit declaration of built-in function 'strcpy'
/in/foo.c:31:13: note: include '<string.h>' or provide a declaration of 'strcpy'
/in/foo.c:31:25: warning: passing argument 2 of 'strcpy' makes pointer from integer without a cast [-Wint-conversion]
             strcpy(Name,i);
                         ^
/in/foo.c:31:25: note: expected 'const char *' but argument is of type 'int'
/in/foo.c:38:21: error: 'i' undeclared (first use in this function)
  printf("%c\n",Name[i]);
                     ^
/in/foo.c:12:6: warning: variable 'sum' set but not used [-Wunused-but-set-variable]
  int sum[N];
      ^~~
/in/foo.c:7:6: warning: unused variable 'n' [-Wunused-variable]
  int n=0;
      ^
/in/foo.c:6:6: warning: unused variable 'sumBUD' [-Wunused-variable]
  int sumBUD,sumAll=0;
      ^~~~~~