How can I create a data structure for a 64 bit integer in a 32 bit architecture?

Question

I am trying to make data structure for a 64 bit integer in a 32 bit architecture.
Any idea to do this will be appreciate .

        struct make
        { 
            int a;// how to make  64 bit integer in a 32 bit  architecture.
         }

NOTE : I have a question, Will a C program compiled on a 32 bit Intel processor execute successfully on a 32 bit AMD processor?

Answer 1

Use a long long

On the IA32 architecture, 64-bit integer (long long) are implemented in using two 32-bit registers (eax and edx).

Answer 2

The long long datatype is usually 64 bits regardless of architecture.

Edit: with regard to your note, AMD and Intel processors use the same instruction set architectures. So, yes, a program compiled on an Intel chip should run on an AMD chip. (I assume you are talking about desktop cpus.)