/in/foo.c:1:1: warning: data definition has no type or storage class
 a=congratulations
 ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
/in/foo.c:1:3: error: 'congratulations' undeclared here (not in a function)
 a=congratulations
   ^~~~~~~~~~~~~~~
/in/foo.c:2:1: error: expected ',' or ';' before 'print'
 print(a)
 ^~~~~