/in/foo.cc: In function 'int main()':
/in/foo.cc:16:9: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   16 |         if(w>c)
      |         ^~
/in/foo.cc:5:28: note: 'c' was declared here
    5 |         double V,G,M,N,a,b,c,w;
      |                            ^
/in/foo.cc:12:9: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized]
   12 |         if(a>b)
      |         ^~
/in/foo.cc:5:26: note: 'b' was declared here
    5 |         double V,G,M,N,a,b,c,w;
      |                          ^