/in/foo.c: In function 'main':
/in/foo.c:4:4: warning: statement with no effect [-Wunused-value]
    4 |    scanf n
      |    ^~~~~
/in/foo.c:4:9: error: expected ';' before 'n'
    4 |    scanf n
      |         ^~
      |         ;
/in/foo.c:8:4: error: expected declaration or statement at end of input
    8 |    else
      |    ^~~~