Eroare de compilare: user.cpp: In function ‘long double dist(int, int, int, int)’: user.cpp:14: error: ‘abs’ was not declared in this scope user.cpp:14: error: ‘pow’ was not declared in this scope user.cpp:14: error: ‘sqrt’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:68: warning: comparison between signed and unsigned integer expressions user.cpp:20: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:21: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result