Eroare de compilare: user.cpp:1:21: error: iostream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:18: error: ‘nbsp’ was not declared in this scope user.cpp:8: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:9: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result