Compilare: user.cpp: In function ‘int Z(int, int, int)’: user.cpp:11:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (k==1) ^ user.cpp: In function ‘int main()’: user.cpp:31:6: warning: unused variable ‘kkk’ [-Wunused-variable] int kkk,n,teste; ^ user.cpp: In function ‘int Z(int, int, int)’: user.cpp:25:1: warning: control reaches end of non-void function [-Wreturn-type] } ^