Compilare: user.cpp: In function ‘int main()’: user.cpp:49:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<plan.size();i++) ^ user.cpp:50:41: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(plan[i].x<p0.x || plan[i].x==p0.x&&plan[i].y<p0.y) ^ user.cpp:67:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2;i<plan.size();i++) ^ user.cpp:35:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&n); ^ user.cpp:39:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%lf%lf",&b.x,&b.y); ^