Swapping an array of structs' element with another element

Question

I'm trying to swap an array of structs, and I thought following a similar fashion of storing in a temp would work like this:

int temp ,a, b;
temp = a;
a = b;
b = temp;

My array of struct definition is this:

struct storage data[10];

My attempt to swap an array of structs, I tried this:

struct storage temp[1];
temp = data[1];
data[1] = data[2];
data[2] = temp;

Unfortunately, it doesn't compile

My errors are below:

error #2168: Operands of '=' have incompatible types 'struct storage[1]' and 'struct storage'.

error #2088: Lvalue required.

error #2168: Operands of '=' have incompatible types 'struct storage' and 'struct storage*'.

cnicutar · Accepted Answer · 2012-08-23 19:53:14Z

5

In C arrays aren't modifiable lvalues. Drop the [1] and you're set:

struct storage temp;

answered Aug 23, 2012 at 19:53

cnicutar

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Comments

Kobo · Accepted Answer · 2012-08-23 19:56:35Z

1

You are trying to hold a struct storage that you dereferenced when you said

temp = data[1];

You need to declare your temp variable as such to hold the dereferenced values from the array

struct storage temp;

answered Aug 23, 2012 at 19:56

Kobo

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