/in/foo.c:1:1: warning: data definition has no type or storage class
 answer=input()
 ^~~~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'answer' [-Wimplicit-int]
/in/foo.c:1:8: warning: implicit declaration of function 'input' [-Wimplicit-function-declaration]
 answer=input()
        ^~~~~
/in/foo.c:1:8: error: initializer element is not constant
/in/foo.c:2:1: error: expected ',' or ';' before 'match'
 match answer:
 ^~~~~