/in/foo.c: In function 'main':
/in/foo.c:16:2: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%d %d",a0,b0);
  ^~~~~~~~~~~~~~~~~~~~~
/in/foo.c:16:2: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
/in/foo.c: In function 'FindMaxNeg':
/in/foo.c:32:9: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return x;
         ^