Compilare: user.cpp: In member function ‘void Heap::Down_Heap(int)’: user.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(2*node<H.size()) ^ user.cpp:48:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(2*node+1<H.size()&&val>H[2*node+1].val) ^ user.cpp: In function ‘int main()’: user.cpp:87:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:91:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&Type); ^ user.cpp:96:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d\n",&X); ^ user.cpp:101:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d\n",&X); ^