datorii.cpp: In function `int main()': datorii.cpp:6: `citire' undeclared (first use this function) datorii.cpp:6: (Each undeclared identifier is reported only once for each function it appears in.) datorii.cpp:7: `afisare' undeclared (first use this function) datorii.cpp:8: `scriere' undeclared (first use this function)