Function Help

[idkterrible]

I am writing a lottery program and I am almost done but have one problem. The user input cannot have the same number twice and the assignment came with a function to use so that doesnt happen. I am unsure of what to put in the while loop with the function in it. please help.

    void getChoices( int array[], int numValues )
    {
         int i, upperBd=10;
		  
         for (i=0; i < MAX_PICK; i++)
         {
             cout << "Enter a Number ";
             
             while (isDuplicate(array, numValues, )) // should be something after numValues,but I dont know what
             {
             	cout << "Enter a Number ";
			 }
             array[i] = getUserNum( upperBd );                                                                        
         }
         
         
    }

[keskiverto]

I wrote to survivor31, who probably has the same homework as you:

You have two nested loops. Would it be enough to have just one?
1. Read number
2. If number is valid, then add it to list
3. Repeat from 1 until the list is full

[PBachmann]

Here is a simple code that has a user enter numbers 10 times, but asks for a different number if any are repeated. myArray[10] is a list of 0s
{0 0 0 0 0 0 0 0 0 0}
and when (for example) 5 is guessed, element 4 becomes a 1
{0 0 0 0 1 0 0 0 0 0}
the array will keep track of what numbers are guessed.

// PBachmann
// Duplicate Integer Input Prevention
// 2 April 2016

#include <iostream>

using namespace std;

// Returns the number(1 or 0) at myArray[x] then sets that element to 1
bool checkDuplicate(int x, bool myArray[]){
    bool placeholder = myArray[x];
    myArray[x] = 1;

    return (placeholder);
}

// Displays the array
void print_myArray(bool myArray[]){
    cout << "{" << myArray[0];
    for(int i = 1; i < 10; i++){
        cout << " " << myArray[i];
    }
    cout << "}\n";
}

int main(){
    int value;
    bool myArray[10] = {0}; // myArray[10] means there are 10 guessable numbers: 1-10

    for(int i = 0; i < 10; i++){ // Runs 10 times
        print_myArray(myArray);

        cout << "Enter a number: ";
        cin >> value;

        // I use value-1 here to shift the guessable numbers 1-10 to elements 0-9 in the array
        while (checkDuplicate(value-1, myArray)){
            cout << "You already entered " << value << ", try again.\nEnter a number: ";
            cin >> value;
        }
    }
    return 0;
}

Does this help at all?