Compilare: user.cpp: In function ‘int main()’: user.cpp:83: warning: NULL used in arithmetic user.cpp:97: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int decod2(char*)’: user.cpp:40: warning: control reaches end of non-void function user.cpp: In function ‘int main()’: user.cpp:75: warning: ‘current’ may be used uninitialized in this function