foo.c: In function 'UninonSet':
foo.c:23:13: warning: unused variable 'i' [-Wunused-variable]
   23 |         int i,nc=0;
      |             ^
foo.c: In function 'main':
foo.c:41:9: warning: 'nc' is used uninitialized [-Wuninitialized]
   41 |         output(c,nc);
      |         ^~~~~~~~~~~~
foo.c:34:22: note: 'nc' was declared here
   34 |         int n1,n2,n3,nc,nd;
      |                      ^~
foo.c:43:9: warning: 'nd' is used uninitialized [-Wuninitialized]
   43 |         output(d,nd);
      |         ^~~~~~~~~~~~
foo.c:34:25: note: 'nd' was declared here
   34 |         int n1,n2,n3,nc,nd;
      |                         ^~

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