how to add 2d arrays using pointers

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C

#include<stdio.h>
#include<conio.h>
void main()
{
    int numArray[10];
    int i,sum=0;
    int *ptr;
    printf("\nEnter 10 elements:");
    for(i=0;i<10;i++)
    scanf("%d",&numArray[i]);
    ptr=numArray;
    for(i=0;i<10;i++)
    {
        sum=sum+ *ptr;
        ptr++;
    }
    printf("The sum of array elements:%d",sum);
    getch();
}

i have done this but i dont know how to do it with 2d array...please help..

Posted 23-Sep-14 3:14am

Abhinav Chaudhary

Updated 23-Sep-14 3:31am

Richard MacCutchan

v2

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Richard MacCutchan · Accepted Answer · 2014-09-23T03:37:00

Much the same except you have two co-ordinates. Think of it in terms of rows and columns. So an array with three rows and five columns would be something like:

C++

#define NUM_ROWS 3
#define NUM_COLS 5
int array[NUM_ROWS][NUM_COLS];
int row, column;
for (row = 0; row < NUM_ROWS; row++)
{
    for (column = 0; column < NUM_COLS; column++)
    {
        array[row][column] = /* add value to this row and column of array */
    }
}