Eroare de compilare: user.cpp: In function ‘void summa(int)’: user.cpp:25:16: error: ‘j’ was not declared in this scope sum += abs(s[j] - 2*s); ^ user.cpp: In function ‘void citire()’: user.cpp:10:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("flip.in","r",stdin); ^ user.cpp: In function ‘int main()’: user.cpp:47:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("flip.out","w",stdout); ^