robotel.cpp: In function 'void Read()': robotel.cpp:65: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result robotel.cpp:69: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result robotel.cpp:72: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result robotel.cpp:74: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result robotel.cpp: In function 'int main()': robotel.cpp:159: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result robotel.cpp:160: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result