Eroare de compilare: user.c:1:20: error: fstream.h: No such file or directory user.c:3:22: error: iostream.h: No such file or directory user.c:4:20: error: vector.h: No such file or directory user.c:6:23: error: algorithm.h: No such file or directory user.c:7:24: error: functional.h: No such file or directory user.c: In function 'main': user.c:13: error: 'bool' undeclared (first use in this function) user.c:13: error: (Each undeclared identifier is reported only once user.c:13: error: for each function it appears in.) user.c:13: error: expected ';' before 'da' user.c:14: error: 'ifstream' undeclared (first use in this function) user.c:14: error: expected ';' before 'f' user.c:15: error: 'ofstream' undeclared (first use in this function) user.c:15: error: expected ';' before 'g' user.c:18: error: 'f' undeclared (first use in this function) user.c:30: error: 'da' undeclared (first use in this function) user.c:30: error: 'true' undeclared (first use in this function) user.c:33: warning: implicit declaration of function 'next_permutation' user.c:35: error: 'g' undeclared (first use in this function)