foo.cc: In function ‘int main()’:
foo.cc:6:15: warning: ‘n’ is used uninitialized [-Wuninitialized]
    6 |         while(n)
      |               ^
foo.cc:5:19: note: ‘n’ was declared here
    5 |         int a[15],n,t,p;
      |                   ^
foo.cc:5:21: warning: ‘t’ may be used uninitialized [-Wmaybe-uninitialized]
    5 |         int a[15],n,t,p;
      |                     ^
foo.cc:5:23: warning: ‘p’ may be used uninitialized [-Wmaybe-uninitialized]
    5 |         int a[15],n,t,p;
      |                       ^