Compilare: main.cpp: In function 'int main()': main.cpp:21:12: warning: unused variable 'y' [-Wunused-variable] int x, y, k; ^ main.cpp: In function 'int nr_prim(int)': main.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:39:18: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << j; ^ main.cpp:56:18: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << j; ^