Eroare de compilare: user.c:1:20: error: fstream.h: No such file or directory user.c:2: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'namespace' user.c:4: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'f' user.c:5: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'g' user.c: In function 'main': user.c:7: error: 'f' undeclared (first use in this function) user.c:7: error: (Each undeclared identifier is reported only once user.c:7: error: for each function it appears in.) user.c:9: error: 'g' undeclared (first use in this function)