astre.cpp:1:21: error: fstream.h: No such file or directory astre.cpp: In function 'void citire()': astre.cpp:19: error: 'ifstream' was not declared in this scope astre.cpp:19: error: expected ';' before 'fin' astre.cpp:20: error: 'fin' was not declared in this scope astre.cpp: In function 'void sortare()': astre.cpp:31: error: 'strcpy' was not declared in this scope astre.cpp:32: error: 'strcat' was not declared in this scope astre.cpp:35: error: 'strcmp' was not declared in this scope astre.cpp: In function 'void afisare()': astre.cpp:48: error: 'ofstream' was not declared in this scope astre.cpp:48: error: expected ';' before 'fout' astre.cpp:51: error: 'fout' was not declared in this scope