Eroare de compilare: user.cpp: In function ‘int cautare(int, int)’: user.cpp:14: error: ‘abs’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:24: error: ‘ifstream’ was not declared in this scope user.cpp:24: error: expected ‘;’ before ‘f’ user.cpp:25: error: ‘ofstream’ was not declared in this scope user.cpp:25: error: expected ‘;’ before ‘g’ user.cpp:26: error: ‘f’ was not declared in this scope user.cpp:42: error: ‘g’ was not declared in this scope user.cpp:44: error: ‘g’ was not declared in this scope user.cpp:46: error: ‘g’ was not declared in this scope