Compilare: user.cpp: In function ‘int main()’: user.cpp:15:17: warning: unused variable ‘i’ [-Wunused-variable] int v[MAX], n, i; ^ user.cpp: In function ‘void polish(char*, std::vector<char>, int*, int*)’: user.cpp:28:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < strlen(expr); i++){ ^ user.cpp:53:12: warning: value computed is not used [-Wunused-value] v[*n] == s.back() - 48; ^ user.cpp: In function ‘int main()’: user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in", "r", stdin); ^ user.cpp:13:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out", "w", stdout); ^ user.cpp:17:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", expr); ^