Compilare: user.cpp: In function ‘int main()’: user.cpp:49:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&p,&n,&k); ^ user.cpp:51:93: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lf%lf%lf%lf%lf%lf",&v[i].x1,&v[i].y1,&v[i].x2,&v[i].y2,&v[i].x3,&v[i].y3); ^