伪代码：set sum to 0
Read num 1
Set sum to sum + num1
Read num2
Set sum to sum + num2
Read num3
Set sum to sum + num3
Add num1,2 and 3 to accumulator
Store accumulator into sum
Output sum
Stop
zz
汇编语言：
BR main
sum:.WORD 0x0000
num1:.BLOCK 2
num2:.BLOCK 2
num3:.BLOCK 2
main: LDWA sum,d
DECI num1,d
ADDA num1,d
DECI num2,d
ADDA num2,d
DECI num3,d
ADDA num3,d
STWA sum,d
DECO sum,d
STOP
.END
机器语言：
12 00 0B 00 00 00 00 00 00 00 00 C1 00 03 31 00
05 61 00 05 31 00 07 61 00 07 31 00 09 61 00 09
E1 00 03 39 00 03 00 zz
