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Today, the editor will share with you the relevant knowledge points about how to obtain the length of the array in the c language. the content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article, let's take a look at it.

1. For an array in the form of type array [A], the length of the array is obtained by calculating sizeof.

Int len = sizeof (array) / sizeof (array [0])

2. For the two-dimensional array in the form of type array [A] [B], the number of rows / columns of the two-dimensional array is obtained by calculating the sizeof function.

# include#includevoid main () {int rows = 0; / / number of rows int columns = 0; / / number of columns int arr [3] [4] = {{1 arr 3] [4] = {{1 arr [0]) / sizeof (arr [0]) Printf ("array rows:% d columns:% d total number of elements:% d *% d =% d\ n", rows,columns,rows,columns, rows*columns); for (int I = 0 * I

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