Compilare: user.cpp: In member function ‘void MinHeap::print()’: user.cpp:115: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:128: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:129: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:132: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:138: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:142: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result