prodnr.cpp:15:49: warning: multi-character character constant prodnr.cpp: In function `int main()': prodnr.cpp:36: warning: char format, different type arg (arg 2) prodnr.cpp:49: warning: int format, long int arg (arg 2) prodnr.cpp:50: warning: int format, long int arg (arg 2) prodnr.cpp:50: warning: int format, long int arg (arg 3) prodnr.cpp:52:2: warning: no newline at end of file