/in/foo.cc: In function 'void work()':
/in/foo.cc:18:46: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(;c>='0'&&c<='9';c=getchar()) x=(x<<3)+(x<<1)+c-48;
                                            ~~^~~~
/in/foo.cc:15:6: note: 'x' was declared here
  int x;
      ^
/in/foo.cc:18:46: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(;c>='0'&&c<='9';c=getchar()) x=(x<<3)+(x<<1)+c-48;
                                            ~~^~~~
/in/foo.cc:15:6: note: 'x' was declared here
  int x;
      ^
/in/foo.cc:18:46: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(;c>='0'&&c<='9';c=getchar()) x=(x<<3)+(x<<1)+c-48;
                                            ~~^~~~
/in/foo.cc:15:6: note: 'x' was declared here
  int x;
      ^