foo.cc: In function 'int main()':
foo.cc:125:17: warning: 'kk' may be used uninitialized in this function [-Wmaybe-uninitialized]
             int kk;
                 ^~
foo.cc:19:17: warning: 'yyyy' may be used uninitialized in this function [-Wmaybe-uninitialized]
   return (2*pi-x+y)*r[d];
          ~~~~~~~^~~
foo.cc:114:43: note: 'yyyy' was declared here
         double ans,xx,yy,xf,yf,xh,yh,xxxx,yyyy,hh;
                                           ^~~~
foo.cc:19:17: warning: 'xxxx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   return (2*pi-x+y)*r[d];
          ~~~~~~~^~~
foo.cc:114:38: note: 'xxxx' was declared here
         double ans,xx,yy,xf,yf,xh,yh,xxxx,yyyy,hh;
                                      ^~~~
foo.cc:156:73: warning: 'yyy' may be used uninitialized in this function [-Wmaybe-uninitialized]
         yh=2*pi*(ee[tree[y].d-1]-ee[tree[h].d])-(tree[y].wtcl-tree[yyy].wtcl);
                                                               ~~~~~~~~~~^~~~
foo.cc:155:35: warning: 'xxx' may be used uninitialized in this function [-Wmaybe-uninitialized]
         xh=tree[x].wtcl-tree[xxx].wtcl;
                         ~~~~~~~~~~^~~~

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