foo.c: In function 'main':
foo.c:42:9: warning: 'nc' is used uninitialized [-Wuninitialized]
   42 |         output(c,nc);
      |         ^~~~~~~~~~~~
foo.c:35:22: note: 'nc' was declared here
   35 |         int n1,n2,n3,nc,nd;
      |                      ^~
foo.c:44:9: warning: 'nd' is used uninitialized [-Wuninitialized]
   44 |         output(d,nd);
      |         ^~~~~~~~~~~~
foo.c:35:25: note: 'nd' was declared here
   35 |         int n1,n2,n3,nc,nd;
      |                         ^~

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