2D array size in bytes-CodePudding

I would like to know, how to calculate 2D array's size in bytes.

Array: int data[][5] = {{1, 2, 3}, {0}, {4, 3, 2}};

And how should I calculate the size of this array in bytes.

Programming language is C.

CodePudding user response：

You can use the sizeof operator. The expression sizeof data will give you the size of the array, in bytes.

Here is a short demonstration program:

#include <stdio.h>

int main( void )
{
    int data[][5] = {{1, 2, 3}, {0}, {4, 3, 2}};

    printf( "The size of the array is: %zu\n", sizeof data );
}

In my test environment, this program has the following output:

The size of the array is: 60

The size of the array may be different on different platforms, but on most modern platforms, sizeof(int) is 4, so the array's total size is 4 * 3 * 5, which is 60.