Size of Array

general
, , , ,
1

I encountered a problem while coding for a program. When we pass an array through reference to a function then how can we know about the size of the array that is passed . Remember that we are not passing the size of array.

int main()
{

int a[]={1,2,3,4,5,5,3,2};

func(a);

return 0;}

int func(int a[])

{ //how to know the size of the a if size is not passed to the function

return 0;
}

2

AFAIK that’s not possible in C++, you have to pass size too or you have to use terminating element similar to C strings.

1 Like
3

You have to pass the size of an array to function as parameter, otherwise there is no way to know the number of elements in array. Unlike a string in c which is terminated by a ‘\0’ character, there is no such termination character for arrays in C.