/in/foo.c: In function 'main':
/in/foo.c:6:9: warning: 'n' is used uninitialized [-Wuninitialized]
    6 |         printf("n=%d\n",n);
      |         ^~~~~~~~~~~~~~~~~~
/in/foo.c:4:9: note: 'n' declared here
    4 |     int n;
      |         ^