Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:47:28: error: ‘ls1’ was not declared in this scope scanf("%lf%lf%lf%lf", &ls1, &ls2, &lf1, &lf2); ^ user.cpp:47:34: error: ‘ls2’ was not declared in this scope scanf("%lf%lf%lf%lf", &ls1, &ls2, &lf1, &lf2); ^ user.cpp:47:40: error: ‘lf1’ was not declared in this scope scanf("%lf%lf%lf%lf", &ls1, &ls2, &lf1, &lf2); ^ user.cpp:47:46: error: ‘lf2’ was not declared in this scope scanf("%lf%lf%lf%lf", &ls1, &ls2, &lf1, &lf2); ^ user.cpp:36:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:40:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf%lf", &X1, &Y1, &X2, &Y2); ^ user.cpp: In function ‘int main()’: user.cpp:71:38: 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); ^