1. The following Little Man program is supposed to add two input numbers, subtract a third input number from the sum, and output the result, i.e., OUT = IN1 + IN2 – IN3 Mailbox Mnemonic Code Numeric Code 00 IN 901 01 STO 90 390 02 IN 901 03 04 ADD 90 190 STO 90 390 05 IN 901 06 SUB 90 290 07 OUT 902 08 COB 000 What is wrong with this program? Modify the program so that it produces the correct result. 2. Write a Little Man program that accepts three values as input and produces the largest of the three as output.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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---

### Little Man Computer Program Exercise

1. **Problem Statement:**
   The following Little Man program is supposed to add two input numbers, subtract a third input number from the sum, and output the result, i.e., OUT = IN1 + IN2 - IN3.

#### Little Man Program Code

| Mailbox | Mnemonic Code | Numeric Code |
|---------|---------------|--------------|
| 00      | IN            | 901          |
| 01      | STO 90        | 390          |
| 02      | IN            | 901          |
| 03      | ADD 90        | 190          |
| 04      | STO 90        | 390          |
| 05      | IN            | 901          |
| 06      | SUB 90        | 290          |
| 07      | OUT           | 902          |
| 08      | COB           | 000          |

**Question:** What is wrong with this program? Modify the program so that it produces the correct result.

2. **Exercise:**
   Write a Little Man program that accepts three values as input and produces the largest of the three as output.

---

This concise table format follows the classic Little Man Computer (LMC) instruction set structure and assists students in understanding the input-output process and debugging concepts associated with the LMC.
Transcribed Image Text:Sure! Here's a transcription of the image for an educational website: --- ### Little Man Computer Program Exercise 1. **Problem Statement:** The following Little Man program is supposed to add two input numbers, subtract a third input number from the sum, and output the result, i.e., OUT = IN1 + IN2 - IN3. #### Little Man Program Code | Mailbox | Mnemonic Code | Numeric Code | |---------|---------------|--------------| | 00 | IN | 901 | | 01 | STO 90 | 390 | | 02 | IN | 901 | | 03 | ADD 90 | 190 | | 04 | STO 90 | 390 | | 05 | IN | 901 | | 06 | SUB 90 | 290 | | 07 | OUT | 902 | | 08 | COB | 000 | **Question:** What is wrong with this program? Modify the program so that it produces the correct result. 2. **Exercise:** Write a Little Man program that accepts three values as input and produces the largest of the three as output. --- This concise table format follows the classic Little Man Computer (LMC) instruction set structure and assists students in understanding the input-output process and debugging concepts associated with the LMC.
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