Compilare: user.cpp: In function ‘int main()’: user.cpp:23:18: warning: unused variable ‘t’ [-Wunused-variable] int i, j, s, t, d; ^ user.cpp:23:21: warning: unused variable ‘d’ [-Wunused-variable] int i, j, s, t, d; ^ user.cpp: In function ‘bool vecini(int, int)’: user.cpp:66:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, xx, yy; ^ user.cpp: In function ‘void filla()’: user.cpp:80:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y, xx, yy; ^ user.cpp: In function ‘int main()’: user.cpp:20:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.in","r",stdin); ^ user.cpp:21:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.out","w",stdout); ^ user.cpp:26:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&k); ^ user.cpp:29:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i][j]); ^