Compilare: user.cpp: In function ‘void Read()’: user.cpp:27:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:30:69: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &v[i].x1, &v[i].y1, &v[i].x2, &v[i].y2); ^ user.cpp:32:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &xf1, &yf1, &xf2, &yf2); ^ user.cpp: In function ‘int main()’: user.cpp:122:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tramvai.in", "r", stdin); ^ user.cpp:123:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tramvai.out", "w", stdout); ^