Compilare: user.cpp: In member function ‘void Heap::Down_Heap(int&)’: user.cpp:47:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(2*node<H.size()) ^ user.cpp:49:24: 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:90:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:94:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&Type); ^ user.cpp:99:24: 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:104:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d\n",&X); ^