Compilare: user.cpp: In function ‘int main()’: user.cpp:50:57: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] r[numarIngrediente].s[lening[numarIngrediente]] = NULL; ^ user.cpp:33:39: 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:34:41: 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:36:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (ret); ^ /tmp/ccCvUgHj.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.