src.c:1:3: error: 'a' undeclared here (not in a function)
s=a aa aaa ... a....a(a<=9 n>=1)
^
src.c:1:5: error: 'aa' undeclared here (not in a function)
s=a aa aaa ... a....a(a<=9 n>=1)
^
src.c:1:8: error: 'aaa' undeclared here (not in a function)
s=a aa aaa ... a....a(a<=9 n>=1)
^
src.c:1:12: error: expected expression before '...' token
s=a aa aaa ... a....a(a<=9 n>=1)
^