Compilare: user.cpp: In function ‘int getInt(int&)’: user.cpp:24:34: warning: NULL used in arithmetic [-Wpointer-arith] while(digit(r[p]) && r[p] != NULL) { ^ user.cpp: In function ‘int main()’: user.cpp:53:19: warning: NULL used in arithmetic [-Wpointer-arith] while(r[i] != NULL) { ^ user.cpp:69:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < sol.size(); ++ i) ^ user.cpp:46:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reteta2.in", "r", stdin); ^ user.cpp:47:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reteta2.out", "w", stdout); ^ user.cpp:50:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(r); ^ /tmp/ccQ0MuGH.o: In function `main': user.cpp:(.text.startup+0x5c): warning: the `gets' function is dangerous and should not be used.