Compilare: user.cpp: In function ‘int main()’: user.cpp:14:45: warning: unused variable ‘j’ [-Wunused-variable] long T, t, h1, h2, h3, h4, l ,st, i, n, j, k, flag; ^ user.cpp:14:48: warning: unused variable ‘k’ [-Wunused-variable] long T, t, h1, h2, h3, h4, l ,st, i, n, j, k, flag; ^ user.cpp:14:51: warning: unused variable ‘flag’ [-Wunused-variable] long T, t, h1, h2, h3, h4, l ,st, i, n, j, k, flag; ^ /tmp/ccTPTgNb.o: In function `main': user.cpp:(.text.startup+0x130): warning: the `gets' function is dangerous and should not be used.