Compilare: user.cpp: In function ‘int main()’: user.cpp:25:13: warning: unused variable ‘i’ [-Wunused-variable] int N,K,i=0,k=0,l; ^ user.cpp:25:17: warning: unused variable ‘k’ [-Wunused-variable] int N,K,i=0,k=0,l; ^ user.cpp:25:21: warning: variable ‘l’ set but not used [-Wunused-but-set-variable] int N,K,i=0,k=0,l; ^ user.cpp: In function ‘int minute(int&, int&, int&, int, int)’: user.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type] } ^