Compilare: user.cpp: In function ‘int main()’: user.cpp:49:8: warning: unused variable ‘cond2’ [-Wunused-variable] int cond2 = (ecuatii[i].a * coordonate[j].x1 + ecuatii[i].b * coordonate[j].y1 + ecuatii[i].c) * (ecuatii[i].a * coordonate[j].x2 + ecuatii[i].b * coordonate[j].y2 + ecuatii[i].c); ^ user.cpp:27:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("geometry.in", "r", stdin); ^ user.cpp:28:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("geometry.out", "w", stdout); ^ user.cpp:30:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:34:96: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &coordonate[i].x1, &coordonate[i].y1, &coordonate[i].x2, &coordonate[i].y2); ^