Eroare de compilare: user.cpp: In function ‘int sum(int)’: user.cpp:27: warning: left shift count >= width of type user.cpp: In function ‘int value(int)’: user.cpp:52: error: ‘sort’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:91: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:65: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result