/in/foo.cc: In function 'int main()':
/in/foo.cc:30:14: warning: 'n1' is used uninitialized [-Wuninitialized]
   30 |         Input(a,n1);
      |         ~~~~~^~~~~~
/in/foo.cc:28:13: note: 'n1' was declared here
   28 |         int n1,n2;
      |             ^~
/in/foo.cc:31:14: warning: 'n2' is used uninitialized [-Wuninitialized]
   31 |         Input(b,n2);
      |         ~~~~~^~~~~~
/in/foo.cc:28:16: note: 'n2' was declared here
   28 |         int n1,n2;
      |                ^~