Eroare de compilare in evaluator: user.c:1:20: error: fstream.h: No such file or directory user.c:4: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'namespace' user.c: In function 'main': user.c:8: error: 'ifstream' undeclared (first use in this function) user.c:8: error: (Each undeclared identifier is reported only once user.c:8: error: for each function it appears in.) user.c:8: error: expected ';' before 'fin' user.c:9: error: 'ofstream' undeclared (first use in this function) user.c:9: error: expected ';' before 'fout' user.c:12: error: 'fin' undeclared (first use in this function) user.c:20: warning: implicit declaration of function 'abs' user.c:30: error: 'fout' undeclared (first use in this function)