Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19: error: size of array ‘a’ is too large user.cpp:25: error: ‘a’ was not declared in this scope user.cpp:31: error: ‘a’ was not declared in this scope user.cpp:35: error: ‘a’ was not declared in this scope user.cpp:47: error: ‘a’ was not declared in this scope 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:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result