ripstick.cpp: In function 'void readData()': ripstick.cpp:132: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ripstick.cpp:134: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ripstick.cpp: In function 'int main()': ripstick.cpp:139: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ripstick.cpp:140: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result