gropi.cpp:13: error: 'fopen' was not declared in this scope gropi.cpp:14: error: 'fopen' was not declared in this scope gropi.cpp: In function 'void Citire()': gropi.cpp:32: error: 'fscanf' was not declared in this scope gropi.cpp: In function 'void Afisare()': gropi.cpp:47: error: 'fprintf' was not declared in this scope