borg.cpp: In function 'int lgput(int, int)': borg.cpp:9: warning: unused variable 'i' borg.cpp: In function 'void read()': borg.cpp:67: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result borg.cpp:68: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result borg.cpp: In function 'void write()': borg.cpp:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result