Compilare: user.cpp: In function ‘int lgn(int, int)’: user.cpp:17:11: warning: statement has no effect [-Wunused-value] for (i; i>1; i--) ^ user.cpp: In function ‘int lge(int, int)’: user.cpp:25:11: warning: statement has no effect [-Wunused-value] for (j; j<m; j++) ^ user.cpp: In function ‘int lgs(int, int)’: user.cpp:33:11: warning: statement has no effect [-Wunused-value] for (i; i<n; i++) ^ user.cpp: In function ‘int lgv(int, int)’: user.cpp:41:11: warning: statement has no effect [-Wunused-value] for (j; j>1; j--) ^