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This article mainly introduces "how to calculate array length in c language". In daily operation, I believe that many people have doubts about how to calculate array length in c language. Xiaobian consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the question of "how to calculate the length of an array in c language" Next, please follow the editor to study!

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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