Compilare: user.cpp: In function ‘int main()’: user.cpp:61:16: warning: unused variable ‘a’ [-Wunused-variable] int n,i,x,t,m,a; ^ user.cpp: In function ‘int s(int, int, int, short int*)’: user.cpp:21:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int d(int, int, int, short int*)’: user.cpp:40:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int q(int, int, int, short int*)’: user.cpp:58:1: warning: control reaches end of non-void function [-Wreturn-type] } ^