Compilare: user.cpp: In function ‘bool sorting(eu, eu)’: user.cpp:12:25: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(a.x<b.x||a.x==b.x&&a.y<b.y) ^ user.cpp: In function ‘int main()’: user.cpp:62:45: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(v[mid].x<p1.x||v[mid].x==p1.x&&v[mid].y<p1.y) ^ user.cpp:80:45: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(v[mid].x<p2.x||v[mid].x==p2.x&&v[mid].y<p2.y) ^ user.cpp:18:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triang.in","r",stdin); ^ user.cpp:19:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triang.out","w",stdout); ^ user.cpp:20:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:23:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%f%f",&v[i].x,&v[i].y); ^