Help with character array

[sh129951]

Hello, I am seriously stuck on this part of my program in which I have to insert a character into the array and it then pushes the previous characters into the next element box also maintaining the pointer at that spot.




If you copy the code into a compiler and run it, It will function all but the insert function that I cannot seem to grasp

#include <cstdlib>
#include <iostream>
#include <iomanip>

using namespace std;

const int size=5;

void initialize (char text [size], int& current);
void move (int& current, int distance);
void insert (char text [size], int& current, char ch);
void replace (char text [size], int current, char ch);
void print (char text [size], int current);



int main()
{
    
    
    char array[size];  
   
    char ch;
    int distance;
    int current=0;
    char character;
   
    initialize (array, current);
   
        
    do 
    {cout << "Enter p (print), m (move), i (insert), r (replace) or q (quit): ";
    cin >> character;
    cout << endl;
   
    
    
            if(character=='p')
            print (array, current);
            
            
            else if (character=='m')
            { cout << "Enter the distance to move: ";
            cin >> distance;
            move (current, distance);
            }
            
            
            else if (character=='i')
            {
            
            cout << "Enter the character to insert: ";
            cin >> ch;
            cout << endl;
            cout << "Character " <<ch<< " inserted at index " << current<< endl;
            cout << endl;
            insert (array, current, ch);
            
            
            
            }
            
            else if (character=='r')
            {  
            cout << "Enter the character to replace: ";
            cin >> ch;
            cout << endl;
            cout << "Character " <<ch<< " placed at index " <<current<< endl;
            replace (array, current, ch);
            cout << endl;
             }
            
             

}
    while (character!='q');
    return EXIT_SUCCESS;

}

    

void initialize (char text [size], int& current)
{
     current=0;
     
     int index;

     for (index=0; index<size; index++)
     {
         text[index]='*';
                  
                            }
               
               

}

void move (int& current, int distance)
{
     
     
     if (distance+current>size-1)
     {
      cout << "Error, new position "<<distance<<" is illegal!"<< endl;
      cout << endl;
      }
      else if (distance+current<0)
      {
      cout <<"Error, new position "<< distance<<" is illegal!"<< endl;
      cout << endl;
      }
      else      
      {
      (current=current+distance);
      cout <<"current index changed to: "<< distance<< endl;
      cout << endl;
      }
      
}
  
void replace (char text [size], int current, char ch)
{
    text[current]=ch;
    
       
 }

    
    
void insert (char text [size], int& current, char ch)
{
     int index;
     
     if (current<size-1)
        
        {
         for (index=size-1; index>current; index--);
             {
             
             text[index]=ch;
             text[current-1]=ch;
             current++;
             
             }
            
         
         }
        
        
     else
     cout << "Error, insertion is not allowed" << endl;             
            
     
 }
 
  
void print (char text [size], int current)
{
     int i;
     
     cout << "The current array is: " << endl;
     
     
     for (i=0; i<size; i++)
         cout << text[i];
      cout << endl;
     cout << setw(current+1)<<"^" << endl;
     cout << endl;
     
     
    

}

[Zhuge]

Please use [code] tags around your code to make it readable.

The first algorithm that comes to mind is to start at the last character in the array and move it to the right one space; repeat this process moving left until you are at the index to insert to. At that point, you'll have effectively moved all of the string to the right one space from where you want to insert and can just write the character in.

[sh129951]

Thanks for the reply, I have also edited the post to make it more readable.

When the program is initiated the array outputs

*****

when replace is called and entered the letter 'K' the program outputs

K****
^

When insert is called and 'J' is entered the program is suppose to output

JK*** (the caret is now suppose to be under K)
^

But I can only get the program to output J***** like its acting as another replace function

[Zhuge]

Did you try to implement the algorithm I mentioned in my previous post? Or is there some other method you are trying to use? I ask because it'd probably help me see where you are going wrong with the implementation.

[sh129951]

sorry for that. Im trying to use a for loop with the included if else statement that is in the code. I think I am messing up the for loop as the if else statements function correctly when I run the program. I am trying to get the index to be one less than array size because its a constant and I need it to work with any size array. A teacher aid only told me that my for loop was messed up and I've been sitting here for the past 6 hours trying to figure it out.

I can not seem to code that algorithm as i have been killing myself over figuring it out

[sh129951]

Insert outputs J****
With pointer under J

I need the insert function to carry the K with it to look like JK***
With pointer under K

[sh129951]

Help! Im still stuck another day later

[sh129951]

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