Compilare: main.cpp: In function 'int main()': main.cpp:18:14: warning: statement has no effect [-Wunused-value] a!=b; ~^~~ main.cpp:14:11: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] if ( a%b==0) { ~^~ main.cpp:14:11: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]