Compilare: user.cpp: In function ‘bool ok()’: user.cpp:47:12: warning: unused variable ‘num’ [-Wunused-variable] int i, num; ^ user.cpp: In function ‘int main()’: user.cpp:78:9: warning: unused variable ‘num’ [-Wunused-variable] int num, xAux, yAux, nRot, i; ^ user.cpp:78:14: warning: unused variable ‘xAux’ [-Wunused-variable] int num, xAux, yAux, nRot, i; ^ user.cpp:78:20: warning: unused variable ‘yAux’ [-Wunused-variable] int num, xAux, yAux, nRot, i; ^ user.cpp:76:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("overlap.in", "r", stdin); ^ user.cpp:77:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("overlap.out", "w", stdout); ^ user.cpp:80:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp: In member function ‘void POINT::read(int)’: user.cpp:18:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^