Display IDs with scores Program plan: Filename: “ScoreException.java” Define “ScoreException” class which extends from “Exception” class Define the constructor Call the super method. Filename: “TestScore.java” Include the header file Define the class “TestScore” Define the “main” method Declare the variables and set the required values to the variables Iterate “for” loop until it reaches length of the “ids” Get the scores from the user In “try” block, Check “ scores[x] ” is greater than “HIGHLIMIT” Set the score Throw an exception In “catch” block, display the error and set “ scores[x] ” is 0 Display the five ids with scores

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The next problem concerns the following C code: /copy input string x to buf */ void foo (char *x) { char buf [8]; strcpy((char *) buf, x); } void callfoo() { } foo("ZYXWVUTSRQPONMLKJIHGFEDCBA"); Here is the corresponding machine code on a Linux/x86 machine: 0000000000400530 : 400530: 48 83 ec 18 sub $0x18,%rsp 400534: 48 89 fe mov %rdi, %rsi 400537: 48 89 e7 mov %rsp,%rdi 40053a: e8 d1 fe ff ff 40053f: 48 83 c4 18 add callq 400410 $0x18,%rsp 400543: c3 retq 0000000000400544 : 400544: 48 83 ec 08 sub $0x8,%rsp 400548: bf 00 06 40 00 mov $0x400600,%edi 40054d: e8 de ff ff ff callq 400530 400552: 48 83 c4 08 add $0x8,%rsp 400556: c3 This problem tests your understanding of the program stack. Here are some notes to help you work the problem: • strcpy(char *dst, char *src) copies the string at address src (including the terminating '\0' character) to address dst. It does not check the size of the destination buffer. You will need to know the hex values of the following characters:

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Chapter 12, Problem 8PE

Program Plan Intro

Display IDs with scores

Program plan:

Filename: “ScoreException.java”

Define “ScoreException” class which extends from “Exception” class

Define the constructor

Call the super method.

Filename: “TestScore.java”

Include the header file

Define the class “TestScore”

Define the “main” method

Declare the variables and set the required values to the variables

Iterate “for” loop until it reaches length of the “ids”

Get the scores from the user

In “try” block,

Check “scores[x]” is greater than “HIGHLIMIT”

Set the score

Throw an exception

In “catch” block, display the error and set “scores[x]” is 0

Display the five ids with scores

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The next problem concerns the following C code: /copy input string x to buf */ void foo (char *x) { char buf [8]; strcpy((char *) buf, x); } void callfoo() { } foo("ZYXWVUTSRQPONMLKJIHGFEDCBA"); Here is the corresponding machine code on a Linux/x86 machine: 0000000000400530 : 400530: 48 83 ec 18 sub $0x18,%rsp 400534: 48 89 fe mov %rdi, %rsi 400537: 48 89 e7 mov %rsp,%rdi 40053a: e8 d1 fe ff ff 40053f: 48 83 c4 18 add callq 400410 $0x18,%rsp 400543: c3 retq 0000000000400544 : 400544: 48 83 ec 08 sub $0x8,%rsp 400548: bf 00 06 40 00 mov $0x400600,%edi 40054d: e8 de ff ff ff callq 400530 400552: 48 83 c4 08 add $0x8,%rsp 400556: c3 This problem tests your understanding of the program stack. Here are some notes to help you work the problem: • strcpy(char *dst, char *src) copies the string at address src (including the terminating '\0' character) to address dst. It does not check the size of the destination buffer. You will need to know the hex values of the following characters:

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