ecuatii.cpp: In function `void rez(char*, long long int&, long long int&)': ecuatii.cpp:31: warning: assignment to non-pointer type `char' from NULL ecuatii.cpp:31: warning: argument to non-pointer type `char' from NULL ecuatii.cpp: In function `int main()': ecuatii.cpp:56: warning: char format, different type arg (arg 2) ecuatii.cpp:59: warning: assignment to non-pointer type `char' from NULL ecuatii.cpp:59: warning: argument to non-pointer type `char' from NULL ecuatii.cpp:68: warning: use of `ll' length modifier with `f' type character