Answer:
d
Explanation:
is the because that's the amount of work in making machine can do producing heat
Answer:
it goes low to high off and on
Explanation:
because i wrote it
Answer:
#include <iostream>
#include <string>
#include "user.h"
#include "password.h"
using namespace Authenticate;
using namespace std;
int main()
{
inputUserName();
inputPassword();
cout << "Your username is " << getUserName() <<
" and your password is: " <<
getPassword() << endl;
return 0;
}
user.h:
#ifndef USER_H
#define USER_H
#include <string>
using namespace std;
namespace Authenticate
{
namespace
{
bool isvalid();
}
void inputUserName();
string getUserName();
}
#endif
user.cpp:
#include <iostream>
#include "user.h"
namespace Authenticate
{
string username="";
namespace
{
bool isvalid()
{
if(username.length() == 8)
return true;
else
return false;
}
}
void inputUserName(){
do
{
cout << "Enter your username (8 letters only)" << endl;
cin >> username;
}
while(!isvalid());
}
string getUserName()
{
return username;
}
}
password.h:
#ifndef PASSWORD_h
#define PASSWORD_h
#include <string>
using namespace std;
namespace Authenticate
{
namespace
{
bool isValid();
}
void inputPassword();
string getPassword();
}
#endif
password.cpp:
#include <iostream>
#include <string>
using namespace std;
namespace Authenticate
{
string password="";
namespace
{
bool isValid()
{
if(password.length() >= 8)
{
for(int i=0; i<password.length(); i++)
if(password[i] >= '0' && password[i] <= '9')
return true;
return false;
}
else
return false;
}
}
void inputPassword(){
do
{
cout << "Enter your password (at least 8 characters " <<
"and at leat one non-letter)" << endl;
cin >> password;
}
while(!isValid());
}
string getPassword()
{
return password;
}
}
The tool you would use are brake line wrenches.
