Pep9

1.伪代码

Set sum to 0

Read num1

Set sum to sum+num1

Read num2

Set sum to sum+num2

Read num3

Set sum to sum+num3

Write sum

2.机器指令

12 00 0E 00 00 00 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 0A

61 00 0A E1 00 03 39 00 03 00 zz

3.汇编语言

BR main

sum:.WORD 0x0000

num1:.BLOCK 2

num2:.BLOCK 3

num3:.BLOCK 4

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