Eroare de compilare: user.cpp: In function ‘void afisare_sol()’: user.cpp:27: warning: comparison between signed and unsigned integer expressions user.cpp:30: error: ‘itoa’ was not declared in this scope user.cpp: In function ‘void df(int)’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void df2(int)’: user.cpp:52: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:58: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result