Compilare: user.cpp: In function ‘int main()’: user.cpp:81:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<r.size();i++)printf("%d ",r[i]); ^ user.cpp:45:11: warning: unused variable ‘p’ [-Wunused-variable] POINT p; ^ user.cpp:72:9: warning: unused variable ‘cnt’ [-Wunused-variable] int cnt=0; ^ user.cpp:38:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi.in","r",stdin); ^ user.cpp:39:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi.out","w",stdout); ^ user.cpp:46:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:49:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d",&x1,&y1,&x2,&y2,&x3,&y3); ^ user.cpp:68:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^