/in/foo.cc: In function 'int main()':
/in/foo.cc:85:18: warning: 'p1' may be used uninitialized [-Wmaybe-uninitialized]
   85 |     cout << p1 - p;
      |                  ^
/in/foo.cc:6:27: note: 'p1' was declared here
    6 |     int  m, d, m1 ,d1, p, p1, d2;
      |                           ^~
/in/foo.cc:85:18: warning: 'p' may be used uninitialized [-Wmaybe-uninitialized]
   85 |     cout << p1 - p;
      |                  ^
/in/foo.cc:6:24: note: 'p' was declared here
    6 |     int  m, d, m1 ,d1, p, p1, d2;
      |                        ^