/in/foo.cc: In function 'int gcd(int, int)':
/in/foo.cc:5:19: warning: 'xx' is used uninitialized [-Wuninitialized]
    5 |         int xx,yy,r=xx%yy;
      |                   ^
/in/foo.cc:5:13: note: 'xx' was declared here
    5 |         int xx,yy,r=xx%yy;
      |             ^~
/in/foo.cc:5:19: warning: 'yy' is used uninitialized [-Wuninitialized]
    5 |         int xx,yy,r=xx%yy;
      |                   ^
/in/foo.cc:5:16: note: 'yy' was declared here
    5 |         int xx,yy,r=xx%yy;
      |                ^~
/in/foo.cc: In function 'int lcm(int, int)':
/in/foo.cc:16:19: warning: 'xx' is used uninitialized [-Wuninitialized]
   16 |         int xx,yy,r=xx%yy;
      |                   ^
/in/foo.cc:16:13: note: 'xx' was declared here
   16 |         int xx,yy,r=xx%yy;
      |             ^~
/in/foo.cc:16:19: warning: 'yy' is used uninitialized [-Wuninitialized]
   16 |         int xx,yy,r=xx%yy;
      |                   ^
/in/foo.cc:16:16: note: 'yy' was declared here
   16 |         int xx,yy,r=xx%yy;
      |                ^~