Compilare: user.cpp: In function ‘int main()’: user.cpp:57:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=m;i++) ~^~~ user.cpp:51:2: warning: ‘e’ may be used uninitialized in this function [-Wmaybe-uninitialized] e=e*b; ~^~~~ user.cpp:14:10: warning: ‘v’ may be used uninitialized in this function [-Wmaybe-uninitialized] t=t*y; ~^~~~ user.cpp:20:17: note: ‘v’ was declared here int i,d,p,c,v,e,f,ok=0; ^