Compilare: user.cpp: In function ‘int main()’: user.cpp:28:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bruiaj.in","r",stdin); freopen("bruiaj.out","w",stdout); ^ user.cpp:28:66: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bruiaj.in","r",stdin); freopen("bruiaj.out","w",stdout); ^ user.cpp:30:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%f %f %f %f %f %f", &x1, &y1, &x2, &y2, &x3, &y3); ^