Help With Arrays

This is a discussion on Help With Arrays within the C++ Programming forums, part of the General Programming Boards category; /*I want to load arrays and display arrays that will have numbers 1-25 in this format 1 2 3 4 ...

  1. #1
    eat my shorts!
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    Post Help With Arrays

    /*I want to load arrays and display arrays that will have numbers 1-25 in this format

    1 2 3 4 5
    6 7 8 9 10
    11 12 and so on...

    i have got 2 functions
    1st one will load arrays n second one will display */

    Code:
     
    
    void loadArray() 
    { 
    int r, c, cnt=1; 
    
    for( r=0; r<5; r++ ) 
    for( c=0; c<5; c++ ) 
    data[r][c] = cnt++; 
    } 
    
    void displayArray( ) 
    { 
    int r, c, temp; 
    
        cout << "The 5 x 5 2D array:\n\n"; 
    
        for (r=0;r<5;r++) 
       { 
           for(c=0;c<5;c++) 
           { 
            cout << " " << data[r][c]; 
           } 
       } 
    
    displayArray(); 
    getchar(); 
    
    pause(); 
    }
    //i want to display arrays when ever i call func DisplayArrays();

  2. #2
    Registered User Dual-Catfish's Avatar
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    Well, displayArray is recursive.. with no sign of stopping. Therefore, if you call it once itt'l continue to output the data... forever.

  3. #3
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    so tell me wat to do
    n u didnt actually answere my question witch was
    how would i display the array in 5x5 format

  4. #4
    Registered User Dual-Catfish's Avatar
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    Code:
    void displayArray( ) 
    { 
    int r, c, temp; 
    
        cout << "The 5 x 5 2D array:\n\n"; 
    
        for (r=0;r<5;r++) 
       { 
           for(c=0;c<5;c++) 
           { 
            cout << " " << data[r][c]; 
           }
            cout << endl;
       } 
    
    getchar(); 
    
    pause(); 
    }
    Ooops, sorry about that There ya go

  5. #5
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    thx now let me see if it works




    it works thx man
    Last edited by dayknight; 05-04-2002 at 08:18 PM.

  6. #6
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    ok now i am stuck on adding rows n colums

    Code:
    void sumRows( )
    {
    	int	r, c, row;
    	
    	cout << "Enter row number:\t ";
    	cin  >> row;
    
    	for (r=0;r<5;r++)
    	{
    		for(c=0;c<5;c++)
    		{
    			csum = data[row][c] + data[row][c];
    		}
    	}
                   cout << " "<<csum;
    	cout << "\n\nSwapping done:\n";
    	displayArray();
    }
    codewarrior gives me this error:

    illegal operrand
    and it is on the semicolon


    and i was also having trouble showing the array backwards
    (it is not that i dont know, i have done this program b4, but i keep forgetting how i did.)
    Last edited by dayknight; 05-04-2002 at 08:50 PM.

  7. #7
    Registered User Dual-Catfish's Avatar
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    Is the sumRow function supposed to output the sum of a row, or swap elements in that row?

    To output the array backwards just do

    for (int i = 4; i >= 0; i--)
    {
    for (int ii = 4; ii >= 0; ii--)
    {
    cout << data[i][ii];
    }
    cout << endl;
    }

  8. #8
    eat my shorts!
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    the sumRow is suppose to output the sum of the row that is inputted by the user
    for example
    sum of row 1 is 15
    Last edited by dayknight; 05-05-2002 at 02:14 PM.

  9. #9
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    Code:
    for(c=0;c<5;c++)
    		{
    			csum = data[row][c] + data[row][c];
    		}
    try this instead csum+=data[row];
    or csum=csum+data[row];
    also don't forget to declare csum
    Last edited by rip1968; 05-05-2002 at 03:55 PM.

  10. #10
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    i can seem to get it to work
    my
    int csum[5]; // it is global
    and it is giving me the same error when i tried with all those different methods.

  11. #11
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    if csum is a global array of 5 integers each holding the sum of a row then try this instead
    csum[row]=csum[row]+data[row,c];

  12. #12
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    Question

    here is the code:

    Code:
    void sumRows( )
    {
    	int	r, c, row;
    	
    	cout << "Enter row number:\t ";
    	cin  >> row;
    
    	for (r=0;r<5;r++)
    	{
    		for(c=0;c<5;c++)
    		{
    		csum[row]=csum[row]+data[r,c];
    		}
    	}
    	cout << "\n\nSwapping done:\n";
    	displayArray();
    }
    here is the error promped by CODEWARrior
    Error : illegal implicit conversion from 'int *' to
    'int'
    !U1_A4_2.CPP line 193 csum[row]=csum[row]+data[r,c];

    it gave me the same error when i tried
    csum[row]=csum[row]+data[row,c];

    and my csum is an array ie
    csum[5] // it is global

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