terenuri3d.cpp: In function 'int main()': terenuri3d.cpp:133: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result terenuri3d.cpp:134: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result terenuri3d.cpp:136: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result terenuri3d.cpp:139: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result