Compilare: user.cpp: In function ‘bool sorting(eu, eu)’: user.cpp:13:29: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(a.x1<b.x1||a.x1==b.x1&&a.y1<b.y1) ^ user.cpp: In function ‘int main()’: user.cpp:50:20: warning: unused variable ‘a’ [-Wunused-variable] double a,b; ^ user.cpp:70:48: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(v[mid].x1<p1.x1||v[mid].x1==p1.x&&v[mid].y1<p1.y1) ^ user.cpp:88:49: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(v[mid].x1<p2.x1||v[mid].x1==p2.x1&&v[mid].y1<p2.y1) ^ user.cpp:96:15: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d",nr); ^ user.cpp:19:31: 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:20:33: 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:21:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^ user.cpp:25:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf",&v[i].x,&v[i].y); ^