Compilare: user.cpp: In function ‘int main()’: user.cpp:37:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&n); ^ user.cpp:40:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&pts[i].x,&pts[i].y); ^ user.cpp:13:8: warning: ‘ind’ may be used uninitialized in this function [-Wmaybe-uninitialized] p--; ^ user.cpp:34:12: note: ‘ind’ was declared here int i, ind; ^