i am trying to develop a program where you enter a bunch of encrypted letters and the non encrypted one comes out

for instance here is what i have so far (this is in vc++ 6.0, which i currently do use, i used to program on teh PC version of metrowerks codewarrior 6.0)

#include <iostream.h>
#include <iomanip.h>
#include <fstream.h>

char code;

int main()
{
cout << "Decrypter" << endl;
cout << "programmed in c++" << endl;
cout <<"------------------------------------------" << endl;

cout <<"Please Enter Encrypted code" << endl << endl;

cin >> code;

if(cheatcode == '*_#L1Z')
{
cout << "big" << endl;
}


return 0;
}


this is what i have so far, but i am trying to use vectors, so i can search for encryptod letters but i don't have <vector.h> or i can't use apvector.h...why won't it let me use vectors?