/in/foo.c: In function 'main':
/in/foo.c:8:6: error: redeclaration of 'A' with no linkage
  int A[5];
      ^
/in/foo.c:4:18: note: previous declaration of 'A' was here
  int S[200],c[5],A[5];
                  ^
/in/foo.c:14:6: error: 'h' undeclared (first use in this function)
  for(h=0;h<=4;h++)
      ^
/in/foo.c:14:6: note: each undeclared identifier is reported only once for each function it appears in