Compilare: user.cpp: In function ‘int main()’: user.cpp:81:38: 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:82:40: 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: In function ‘void TIMP()’: user.cpp:32:12: warning: attempt to free a non-heap object ‘s’ [-Wfree-nonheap-object] free(s); ^ user.cpp: In function ‘void INGREDIENTE()’: user.cpp:47:14: warning: attempt to free a non-heap object ‘sir’ [-Wfree-nonheap-object] free(sir); ^ user.cpp:55:12: warning: attempt to free a non-heap object ‘R’ [-Wfree-nonheap-object] free(R); ^ user.cpp:55:12: warning: attempt to free a non-heap object ‘R’ [-Wfree-nonheap-object]