Compilare: user.cpp: In function ‘int main()’: user.cpp:150:29: warning: format ‘%f’ expects argument of type ‘double’, but argument 3 has type ‘std::pair<double, std::pair<int, int> >’ [-Wformat=] fprintf(g,"%.6f ",DD[dr]); ^ user.cpp:125:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&N); ^ user.cpp:127:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lf %lf",&S[i].first,&S[i].second); ^ user.cpp:130:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lf %lf",&A[i].first,&A[i].second); ^