Compilare: main.cpp: In function 'int main()': main.cpp:9:13: warning: unused variable 'c' [-Wunused-variable] int a,b,c; ^ main.cpp:12:5: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] if(a==0) ^~ main.cpp:13:15: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<b<<endl; ^