Indirection

Code:

#include <iostream>
using namespace std;
void changevalue(int *value);
main()
{
	int value[10];
	changevalue(value);
	for(int x=0; x<10; x++)
	{
		cout<<value[x]<<endl;//why does this line work...
	}
	return 0;
}
void changevalue(int *value)
{
	for(int x=0; x<10; x++)
	{
		value[x]=x+1;
	}
}

i commented a line...why does that work, when this also works..

Code:

#include <iostream>
using namespace std;
void changevalue(int *value);
main()
{
	int value[10];
	changevalue(value);
	for(int x=0; x<10; x++)
	{
		cout<<*value;//why the need for indirection?
	}
	return 0;
}
void changevalue(int *value)
{
	for(int x=0; x<10; x++)
	{
		value[x]=x+1;
	}
}

why do i need indirection for value (*value) but when i call it as an element from the array, there is no need for the indirection. as in, why does this not work, but the second portion of code does.

Code:

#include <iostream>
using namespace std;
void changevalue(int *value);
main()
{
	int value[10];
	changevalue(value);
	for(int x=0; x<10; x++)
	{
		cout<<*value[x]<<endl;//error
	}
	return 0;
}
void changevalue(int *value)
{
	for(int x=0; x<10; x++)
	{
		value[x]=x+1;
	}
}

Thanks.

value[x] is a variable. (An integer).
value is a pointer to value[0]. (An address).

This makes dealing with string arrays easier, because you often can pass the pointer to a string (or any array) to a function.