Input Validation Homework Help

[RockLobster]

Hi everyone,

I am currently working on a homework assignment for my starting out in C++ class and am having a hard time either with the format of the loops I am using or perhaps something else I am just not seeing. I have read all through my text book and have Googled everything I could think of to try and get it to work properly. If anyone has any input on what I am doing wrong it would be greatly appreciated.

My assignment is:

Write a program that requests a password and verifies that it is a valid
password. To be valid the password must be at least 6 characters long and
contain at least one digit.

Your program should:
1. Determine whether the password is valid. If it is not, a message telling
the user what is wrong should be output
2. If it is valid, the program should thank the user for entering a valid
password

Sample Output (inputs in bold)
Please enter a password: pass6
Passwords must be at least 6 characters long
Please enter a password: TarrantNW
Passwords must include at least one digit (1-9)
Please enter a password: Tccd03
Thank you, that is a valid password

And this is what I have written

#include <iostream>
#include <cctype>
#include <string>
using namespace std;

//Function prototypes
bool testDigits(char []); 
bool testLength (int);

	const int size = 90;
	char password[size]; 
        int length;

int main()
{
	
    cout << "Please enter a password: ";
    cin >> password;

	length = strlen(password);

	testLength(length);	//To test password length
	testDigits(password);   //To test password for numeric digits

	if (testLength(length) && testDigits(password))//If both functions return true
		cout << "Thank you, that is a valid password.\n";
	else
		cout << "That is an invalid password.\n";


    system("pause");
    return 0;
}


bool testDigits(char pass[]) 
{
	int len = strlen(pass);
	
	for (int i = 0; i < len; ++i)

	{
		while (!isdigit(pass[i]))
		{
			cout << "Passwords must contain one digit (1-9)\n";
			cout << "Please enter a password: ";
			cin >> pass;
		}
		if (isdigit(pass[i]))
		return true;
	}
}

bool testLength(int len)	
{
	if (len < 6);
	{
			cout << "Passwords must be at least 6 characters long\n";
			cout << "Please enter a password: ";
			cin >> password;
			len = strlen(password);
	} 
	
	if (len >= 6)
		return true;
	
}

[ne555]

Write pseudocode, I'll show you the syntax.