reading numbers

[kal24]

I've work on this problem for 5 hours now and I can only make it work halfway. this is the question
Read a 4 character number. Output the result in in the following
format, input = 9873
3 ***
7 *******
8 ********
9 *********

If one of the numbers is not a digit, then put a ? mark
input = 98a3
3 ***
a ?
8 ********
9 *********

and this is what I have so far

  #include <iostream>
using namespace std;

int main(int argc, char** argv) {
//Declare Variables 
    int number [4];
    int output=0;
    
    for(int i=0; i<4; i++)
    {
        cout<<"Please enter 4 numbers: "<<i+1<<endl;
        cin>>output;
        number[i]=output;
    
    }
    for(int c=0; c<4;c++)
    {
        
        for(int f=0; f<number[c];f++)
        {
            cout<<"*";
        }
        cout<<endl;
    }
  

return 0;
}

any ideas how to finish this??

[CodeWriter]

Perhaps enter the data as a string not as a number array as you indicate it can have alphabetic characters as well. Then go through the string array to check isDigit in which case print '*' else print '?'

[SamuelAdams]

change to

    char number [4];
    char output=0;

Then google ascii characters and find the value for numbers 1-9

should get you on the right path

[48T7M4Gy]

See: http://www.cplusplus.com/reference/cctype/isalpha/?kw=isalpha

There is also an associated function that will test for numbers ...

[kal24]

how do you do the ascii numbers? like where do you plug them in into?
I'm just missing how to arrange them in order
for example if I plug in 3 4 5 2 I get
***
****
*****
**
and what I want to get is
**
***
****
*****

[48T7M4Gy]

Instead of c= 0 to 4, try c = 4 to 0

[48T7M4Gy]

  #include <iostream>
  
  int main(int argc, char** argv)
  {
    //Declare variable 
    char number [4];
    
    for( int i = 0; i < 4; i++ )
    {
        std::cout << "Please enter 4 numbers: " << i + 1 << std::endl;
        std::cin >> number[i];
    }
    
    for( int i = 0; i < 4; i++ )
    {
        if ( isalpha( number[i]) )
            std::cout << '?';
        else
            for (int j = 0; j < number[i] - '0'; j++ )
                std::cout << '*';
        
        std::cout << std::endl;
    }
    
    return 0;
}

[48T7M4Gy]

OOps, I misunderstood. You have to sort the input.