Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:9: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void cautbin()’: user.cpp:31: error: ‘z’ was not declared in this scope user.cpp:34: error: ‘z’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:50: error: overloaded function with no contextual type information user.cpp:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result