Compilare: user.cpp: In function ‘void SortThemAll()’: user.cpp:44:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < V.size(); ++i) { ^ user.cpp: In function ‘void Answer()’: user.cpp:76:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz + elem >=0 && poz + elem < V.size() && V[poz + elem].yy == y)fprintf(fout,"%d\n",V[poz+elem].xx); ^ user.cpp: In function ‘void ReadThemAll()’: user.cpp:31:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ user.cpp:34:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^ user.cpp: In function ‘void Answer()’: user.cpp:65:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&Q); ^ user.cpp:69:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x,&y); ^