Compilare: main.cpp: In function 'int main()': main.cpp:98:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(t==i)continue;if(t==j)continue; ^~ main.cpp:98:30: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' if(t==i)continue;if(t==j)continue; ^~ main.cpp: In function 'int ccw(dd, dd, dd)': main.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:41:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.in","r",stdin); ^ main.cpp:42:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.out","w",stdout); ^ main.cpp:45:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:48:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf",&a[i].x,&a[i].y); ^