kinder.cpp: In function 'int main()': kinder.cpp:74: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result kinder.cpp:75: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result kinder.cpp:77: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:91: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:95: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:102: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result kinder.cpp:116: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result