Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:14:1: error: expected ‘;’ before numeric constant 2 -2 ^ user.cpp:17:23: warning: statement has no effect [-Wunused-value] double x1,y1,x2,y2; ^ user.cpp:22:29: error: ‘x1’ was not declared in this scope scanf("%d\n%lf %lf",&n,&x1,&y1); ^ user.cpp:22:33: error: ‘y1’ was not declared in this scope scanf("%d\n%lf %lf",&n,&x1,&y1); ^ user.cpp:27:26: error: ‘x2’ was not declared in this scope scanf("%lf %lf",&x2,&y2); ^ user.cpp:27:30: error: ‘y2’ was not declared in this scope scanf("%lf %lf",&x2,&y2); ^ user.cpp:20:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aria.in","r",stdin); ^ user.cpp:21:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aria.out","w",stdout); ^