/in/foo.c: In function 'main':
/in/foo.c:7:13: error: expected ')' before 'i'
  printf("%d"i)
             ^
/in/foo.c:7:11: warning: format '%d' expects a matching 'int' argument [-Wformat=]
  printf("%d"i)
           ^
/in/foo.c:8:1: error: expected ';' before '}' token
 }
 ^
/in/foo.c:5:8: warning: variable 'i' set but not used [-Wunused-but-set-variable]
    int i,x=10,y=20;
        ^