Compilare: user.cpp: In function ‘int main()’: user.cpp:80:36: warning: format ‘%lf’ expects argument of type ‘double’, but argument 3 has type ‘long double’ [-Wformat=] fprintf(fout,"%.12lf",totalCost); ^ user.cpp:37:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&SV,&V); ^ user.cpp:40:70: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&superverts[i].first,&superverts[i].second); ^ user.cpp:44:60: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&verts[i].first,&verts[i].second); ^