/in/foo.c: In function 'main':
/in/foo.c:12:17: warning: 'x2' may be used uninitialized [-Wmaybe-uninitialized]
   12 |                 printf("%.2f,%.2f",x1,x2);
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:5:18: note: 'x2' was declared here
    5 |         float x1,x2;
      |                  ^~