Below is an example of a MASM Assembly program using Irvine32 to calculate and print the perimeter of a circle with a given radius of 5:
INCLUDE Irvine32.inc
.data
radius WORD 5
pi DWORD 31416 ; Value of pi (approximation: 3.1416)
.code
main PROC
movzx eax, radius ; Load the radius into eax
imul eax, 2 ; Multiply the radius by 2 (diameter)
imul eax, pi ; Multiply the diameter by pi to get the perimeter
mov ebx, 10000 ; Scaling factor for decimal places
idiv ebx ; Divide by the scaling factor
call WriteDec ; Display the result
call Crlf
exit
main ENDP
END main
So, the above program figures out how long the edge of a circle is by using the formula: Perimeter = 2 * pi * radius. Pi is about 3. 1416
So, to use the code above, one need to have the Irvine32.inc file in the same directory as their program, and also set up well.