Compilare: main.cpp: In function 'int main()': main.cpp:22:43: warning: format '%lf' expects argument of type 'double*', but argument 3 has type 'long double*' [-Wformat=] fscanf(f,"%lf %lf",&v[i].x,&v[i].y); ^ main.cpp:22:43: warning: format '%lf' expects argument of type 'double*', but argument 4 has type 'long double*' [-Wformat=] main.cpp:30:34: warning: format '%lf' expects argument of type 'double', but argument 3 has type 'long double' [-Wformat=] fprintf(g,"%0.6lf",arie*(0.5)); ^ main.cpp:19:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ main.cpp:22:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lf %lf",&v[i].x,&v[i].y); ^