2d arrays use continous memory, so you can just declare a 1d array and use memcpy. Interesting and good to know. My simple, probably newbie-ish and uncreative algorithm would be: Create new one …

You can force the pointer type using a cast, and that will be a valid pointer, but you cannot then use it as a 2D array. Inside the populate function, C doesn't have the information it need to know how large …

Because only the leftmost index can be arbitrary, all other indices must have a fixed size. In other words, all 2D arrays in C must be rectangular, with the same amount of columns for every row.

In C all arrays are passed by reference, that is the variable is the address of the first element of the array. The trouble you may be having in the second program which uses pointer notation is with …

Similar Threads Subtracting one column in a 2d array from another? By zaihed13 in forum C Programming Replies: 6 Last Post: 10-19-2013, 09:29 AM

May 21, 2012 · Before the array is sent into another function (and decays into having a sizeof (pointer to data type), get the sizeof (array). Now use your sizeof (data type), to calculate the number of rows, …

If you want a 2D array of char, and need a pointer to that [e.g. you want to modify the content of the strings in an array of strings], then you need to pass the length of the strings.

Nov 16, 2012 · Filling up a 2D (or 3D) array. By omnificient in forum C Programming Replies: 1 Last Post: 01-20-2008, 01:22 PM

You don't actually delete the row or column in a 2D array; you just move the latter part of the data by one element (and, optionally, clear the last row/column). In C, with an array declared as a [rows] …

Making a 2d array (matrix) in a struct If I'm trying to make a 2d array in a struct, do I have to make the struct a certain size when I write the prototype? I can't explain it very well, but here's what I'm talking …