/in/foo.cc: In function 'int main()':
/in/foo.cc:5:14: warning: 'i' is used uninitialized in this function [-Wuninitialized]
   int n,i,a[i],b,d,e,g;
              ^
/in/foo.cc:10:11: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized]
   for(int f;f<=i;f++){
           ^
/in/foo.cc:15:11: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
   for(int c;c<=i;c++){
           ^
/in/foo.cc:5:18: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int n,i,a[i],b,d,e,g;
                  ^
/in/foo.cc:19:10: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<e;
          ^
/in/foo.cc:14:4: warning: 'g' may be used uninitialized in this function [-Wmaybe-uninitialized]
   b=g/i;
   ~^~~~