lcdr.cpp: In function 'int main()': lcdr.cpp:91: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result lcdr.cpp:93: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result lcdr.cpp:96: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result