/in/foo.c: In function 'main':
/in/foo.c:5:3: warning: statement with no effect [-Wunused-value]
    5 |  n>=3;
      |  ~^~~
/in/foo.c:5:3: warning: 'n' is used uninitialized [-Wuninitialized]
    5 |  n>=3;
      |  ~^~~
/in/foo.c:4:13: note: 'n' declared here
    4 | {int i; int n;
      |             ^