/in/foo.c:1:1: warning: return type defaults to 'int' [-Wimplicit-int]
 input(intx)
 ^~~~~
/in/foo.c: In function 'input':
/in/foo.c:2:1: error: expected declaration specifiers before 'input'
 input(inty)
 ^~~~~
/in/foo.c:1:1: warning: type of 'intx' defaults to 'int' [-Wimplicit-int]
 input(intx)
 ^~~~~
/in/foo.c:3:1: warning: control reaches end of non-void function [-Wreturn-type]
 print(x+y)
 ^~~~~