Compilare: user.cpp: In function ‘int roots(double*, int, double*, double*)’: user.cpp:40: warning: statement has no effect user.cpp:18: warning: unused variable ‘i’ user.cpp: In function ‘void recurse(double*, int, double*, int, double*, double*, int*)’: user.cpp:168: warning: unused variable ‘e1’ user.cpp:168: warning: unused variable ‘e2’ user.cpp: In function ‘void get_quads(double*, int, double*, double*)’: user.cpp:208: warning: unused variable ‘xr’ user.cpp:208: warning: unused variable ‘xs’ user.cpp: In function ‘int main()’: user.cpp:275: warning: unused variable ‘err’ user.cpp:275: warning: unused variable ‘t’ user.cpp:276: warning: unused variable ‘iter’ user.cpp:273: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:274: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result