Addition of the rows and columns in an array.

This is a discussion on Addition of the rows and columns in an array. within the C Programming forums, part of the General Programming Boards category; Ya, I'm still a newb...it's probly because my teacher has an extremely heavy accent and my book sucks, BUT I ...

  1. #1
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    Nov 2006
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    Addition of the rows and columns in an array.

    Ya, I'm still a newb...it's probly because my teacher has an extremely heavy accent and my book sucks, BUT I still try. Now my problem is trying to make a 5x5 array that adds the rows and columns. like

    0 1 2 3 4 5 blah blah, but I need the user to enter the 10 numbers. so far i have
    1 2 3 4 5 6
    2 3 4 5 6 7
    3 4 5 6 7 8
    4 5
    5
    Code:
    #include<stdio.h>
    
    int main()
    {
    
    int x, y, i;
    int A[5][5];
    float sum;
    
    printf("enter 5 numbers\n");
    
    for (x = 0; x < 5; x++)
    	scanf("%d", &A[x]);
    
    printf("enter 5 more\n");
    
    	for (y = 0; y < 5; y++)
    	scanf("%d", &A[y]);
    
    	i = -1;
    	while (i<5)
    	{
    
    		i++;
    		sum = A[x][y];
    	}
    
    printf("[%d][%d] = %f\n", x, y, sum);
    
    system("PAUSE");
    return 0;
    }
    i know im not even close, but im lost. I've been reading the forums and reading my book over and over, but I can't find any good examples. Thanks for any help.

  2. #2
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    So, do you want to add up all the elements of the array and display the sum? If yes, the following code may help:
    Code:
    #include <stdio.h>
    
    int main()
    {
    	int a[5][5], sum;
    	int i, j;
    
    	
    	for (i=0; i<5; i++) /*Get values from user*/
    		for (j=0; j<5; j++) 
    			scanf("%d", &a[i][j]);
    
    	sum = 0;
    	for (i=0; i<5; i++) /*Calculate sum*/
    		for (j=0; j<5; j++) 
    			sum += a[i][j];
    	
    	return 0;
    }
    You can also combine the two for loops into one.

  3. #3
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    Im looking for more of a table, like what I had in my first post

  4. #4
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    Code:
    #include<stdio.h>
    
    int main()
    {
    
    int x, y, i, j;
    int A[5][5];
    float sum;   // what is this for?
    
    printf("enter 5 numbers\n");
    
    for (x = 0; x < 5; x++)
    	scanf("%d", &A[x][0]);  // reading rows
    
    printf("enter 5 more\n");
    
    	for (y = 0; y < 5; y++)
    	scanf("%d", &A[0][y]);  // reading columns
    
    /* loop to sum & display array */
    for (i=0; i<5; i++) {
         for (j=0; j<5; j++) {
               A[i][j] = A[0][j] + A[i][0];
               printf("%d ", A[i][j]);
         }
         printf("\n");
    }
      
    
    system("PAUSE");
    return 0;
    }
    I believe this is what you're trying to achive.

  5. #5
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    Holy crap, thanks. I see where i've been going wrong. I appreciate the help.

    It would be lovely if my teacher taught this.

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