/in/foo.cc: In function 'int main()':
/in/foo.cc:30:11: warning: 'z' may be used uninitialized in this function [-Wmaybe-uninitialized]
   ans+=x+y+z;
        ~~~^~
/in/foo.cc:13:9: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int x,y,z,j=1;
         ^
/in/foo.cc:13:7: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int x,y,z,j=1;
       ^