auto.cpp: In function 'int vef(int)': auto.cpp:8: warning: unused variable 'j' auto.cpp: In function 'void rez()': auto.cpp:21: warning: unused variable 'j' auto.cpp:21: warning: unused variable 'k' auto.cpp:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result auto.cpp:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result auto.cpp: In function 'int main()': auto.cpp:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result auto.cpp:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result auto.cpp:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result