Compilare: user.cpp: In function ‘int main()’: user.cpp:57:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:59:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lf%lf",&v[i].x,&v[i].y); ^ user.cpp:66:27: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(v[i].x<=v[poz].x){ ^