Compilare: user.cpp: In function ‘void citire()’: user.cpp:46:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int lee(int, int)’: user.cpp:57:25: warning: unused variable ‘l’ [-Wunused-variable] int i, u, p, xv, yv,l, nr=0, nrf=0; ^ user.cpp:57:28: warning: unused variable ‘nr’ [-Wunused-variable] int i, u, p, xv, yv,l, nr=0, nrf=0; ^ user.cpp:57:34: warning: unused variable ‘nrf’ [-Wunused-variable] int i, u, p, xv, yv,l, nr=0, nrf=0; ^ user.cpp: In function ‘int main()’: user.cpp:101:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j; ^ user.cpp:101:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int lee(int, int)’: user.cpp:98:1: warning: control reaches end of non-void function [-Wreturn-type] } ^