Compilare: user.cpp: In function ‘bool check(double)’: user.cpp:88:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mom.size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:99:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("culoar.in","r",stdin); ^ user.cpp:100:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("culoar.out","w",stdout); ^ user.cpp:102:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); PI = acos(-1.00); ^ user.cpp:103:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n;i++) {scanf("%lf%lf",&pct[i].x,&pct[i].y); } ^