Compilare: user.cpp: In function ‘long int parr(char*&)’: user.cpp:58:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i < sir.size(); i++) { ^ user.cpp: In function ‘long int pard(char*&)’: user.cpp:71:10: warning: unused variable ‘rez’ [-Wunused-variable] long rez; ^ user.cpp: In function ‘int main()’: user.cpp:85:10: warning: unused variable ‘i’ [-Wunused-variable] long i, j; ^ user.cpp:85:13: warning: unused variable ‘j’ [-Wunused-variable] long i, j; ^ user.cpp:87:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie.in", "r", stdin); ^ user.cpp:88:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie.out", "w", stdout); ^ user.cpp:89:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccN66eF1.o: In function `main': user.cpp:(.text.startup+0x53): warning: the `gets' function is dangerous and should not be used.