kinder.cpp: In function 'int main()': kinder.cpp:153: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result kinder.cpp:154: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result kinder.cpp:157: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:163: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:166: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:171: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:176: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result