/in/foo.cc: In function 'int main()':
/in/foo.cc:18:22: warning: 'a' is used uninitialized [-Wuninitialized]
   18 |         cout<<s(a,b,c);
      |                      ^
/in/foo.cc:17:13: note: 'a' was declared here
   17 |         int a,b,c;
      |             ^
/in/foo.cc:18:22: warning: 'b' is used uninitialized [-Wuninitialized]
   18 |         cout<<s(a,b,c);
      |                      ^
/in/foo.cc:17:15: note: 'b' was declared here
   17 |         int a,b,c;
      |               ^
/in/foo.cc:18:22: warning: 'c' is used uninitialized [-Wuninitialized]
   18 |         cout<<s(a,b,c);
      |                      ^
/in/foo.cc:17:17: note: 'c' was declared here
   17 |         int a,b,c;
      |                 ^