Compilare: user.cpp: In function ‘int main()’: user.cpp:18:14: warning: statement has no effect [-Wunused-value] for(j; j < L ; ++j){ ^ user.cpp:47:18: warning: statement has no effect [-Wunused-value] for(j; j < L ; ++j){ ^ user.cpp:87:22: warning: statement has no effect [-Wunused-value] for(j; j < L ; ++j){ ^ user.cpp:12:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("coduri.in", "r", stdin); ^ user.cpp:13:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("coduri.out", "w", stdout); ^ user.cpp:14:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:16:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^