ocr.cpp:8: warning: ISO C++ forbids declaration of 'main' with no type ocr.cpp: In function 'int main()': ocr.cpp:10: warning: unused variable 'l' ocr.cpp:26: warning: 'y' may be used uninitialized in this function ocr.cpp:10: warning: 'k' may be used uninitialized in this function ocr.cpp:31: warning: 'q' may be used uninitialized in this function