Compilare: main.cpp: In function 'int main()': main.cpp:40:14: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<v[b] - v[a-1]<<' '<<a<<' '<<b; ~~~^ main.cpp:40:21: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<v[b] - v[a-1]<<' '<<a<<' '<<b; ~^~ main.cpp:35:14: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized] a=p+1; ~^~~~