/in/foo.c: In function 'main':
/in/foo.c:5:4: warning: 'y' is used uninitialized in this function [-Wuninitialized]
  if(y>=z)
    ^
/in/foo.c:5:4: warning: 'z' is used uninitialized in this function [-Wuninitialized]
/in/foo.c:7:4: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
    printf("%d %d %d\n",x,y,z);
    ^~~~~~~~~~~~~~~~~~~~~~~~~~