9th Edition

ISBN: 9780134996066

Author: GADDIS

Publisher: PEARSON CUSTOM PUB.(CONSIGNMENT)

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The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.

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Textbook Question

Chapter 9, Problem 50RQE

int x, *ptr = nullptr;

*ptr = &x;

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Chapter 9, Problem 49RQE

Chapter 9, Problem 51RQE

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Q.1. Architecture performance [10 marks] Answer A certain microprocessor requires either 2, 4, or 6 machine cycles to perform various operations. ⚫ (40+g+f)% require 2 machine cycles, ⚫ (30-g) % require 4 machine cycles, and ⚫ (30-f)% require 6 machine cycles. (a) What is the average number of machine cycles per instruction for this microprocessor? Answer (b) What is the clock rate (machine cycles per second) required for this microprocessor to be a "1000 MIPS" processor? Answer (c) Suppose that 35% of the instructions require retrieving an operand from memory which needs an extra 8 machine cycles. What is the average number of machine cycles per instruction, including the instructions that fetch operands from memory?

Q.2. Architecture performance [25 marks] Consider two different implementations, M1 and M2, of the same instruction set. M1 has a clock rate of 2 GHz and M2 has a clock rate of 3.3 GHz. There are two classes of instructions with the following CPIs: Class A CPI for M1 CPI for M2 2.f 1.g B 5 3 C 6 4 Note that the dots in 2 fand 1.g indicate decimal points and not multiplication. a) What are the peak MIPS performances for both machines? b) Which implementation is faster, if half the instructions executed in a certain program are from class A, while the rest are divided equally among classes B and C. c) What speedup factor for the execution of class-A instructions would lead to 20% overall speedup? d) What is the maximum possible speedup that can be achieved by only improving the execution of class-A instructions? Explain why. e) What is the clock rate required for microprocessor M1 to be a "1000 MIPS" (not peak MIPS) processor?

Chapter 9 Solutions

EBK STARTING OUT WITH C++

Ch. 9.5 - Prob. 9.1CP Ch. 9.5 - Write the definition statement for a variable...Ch. 9.5 - List three uses of the symbol in C++.Ch. 9.5 - What is the output of the following code? int x =...Ch. 9.5 - Rewrite the following loop so it uses pointer...Ch. 9.5 - Prob. 9.6CP Ch. 9.5 - Prob. 9.7CP Ch. 9.5 - Is each of the following definitions valid or...Ch. 9.9 - Prob. 9.9CP Ch. 9.9 - Give an example of the proper way to call the...

Ch. 9.9 - Complete the following program skeleton. When...Ch. 9.9 - Look at the following array definition: const int...Ch. 9.9 - Assume ip is a pointer to an int. Write a...Ch. 9.9 - Prob. 9.14CP Ch. 9.9 - Prob. 9.15CP Ch. 9.9 - Prob. 9.16CP Ch. 9.9 - Prob. 9.17CP Ch. 9 - What does the indirection operator do?Ch. 9 - Look at the following code. int x = 7; int iptr =...Ch. 9 - So far you have learned three different uses for...Ch. 9 - Prob. 4RQE Ch. 9 - Prob. 5RQE Ch. 9 - Prob. 6RQE Ch. 9 - What is the purpose of the new operator?Ch. 9 - What happens when a program uses the new operator...Ch. 9 - Prob. 9RQE Ch. 9 - Prob. 10RQE Ch. 9 - Prob. 11RQE Ch. 9 - Prob. 12RQE Ch. 9 - Each byte in memory is assigned a unique...Ch. 9 - The _________ operator can be used to determine a...Ch. 9 - Prob. 15RQE Ch. 9 - The ________ operator can be used to work with the...Ch. 9 - Array names can be used as ________, and vice...Ch. 9 - Prob. 18RQE Ch. 9 - The ________ operator is used to dynamically...Ch. 9 - Under older compilers, if the new operator cannot...Ch. 9 - Prob. 21RQE Ch. 9 - When a program is finished with a chunk of...Ch. 9 - You should only use pointers with delete that were...Ch. 9 - Prob. 24RQE Ch. 9 - Look at the following array definition: int...Ch. 9 - Prob. 26RQE Ch. 9 - Assume tempNumbers is a pointer that points to a...Ch. 9 - Look at the following function definition: void...Ch. 9 - Prob. 29RQE Ch. 9 - Prob. 30RQE Ch. 9 - Prob. 31RQE Ch. 9 - T F The operator is used to get the address of a...Ch. 9 - T F Pointer variables are designed to hold...Ch. 9 - T F The symbol is called the indirection...Ch. 9 - T F The operator dereferences a pointer.Ch. 9 - T F When the indirection operator is used with a...Ch. 9 - T F Array names cannot be dereferenced with the...Ch. 9 - Prob. 38RQE Ch. 9 - T F The address operator is not needed to assign...Ch. 9 - T F You can change the address that an array name...Ch. 9 - T F Any mathematical operation, including...Ch. 9 - T F Pointers may be compared using the relational...Ch. 9 - T F When used as function parameters, reference...Ch. 9 - T F The new operator dynamically allocates memory.Ch. 9 - T F A pointer variable that has not been...Ch. 9 - Prob. 46RQE Ch. 9 - T F In using a pointer with the delete operator,...Ch. 9 - Prob. 48RQE Ch. 9 - Prob. 49RQE Ch. 9 - int x, ptr = nullptr; ptr = x;Ch. 9 - Prob. 51RQE Ch. 9 - Prob. 52RQE Ch. 9 - Prob. 53RQE Ch. 9 - float level; int fptr = level;Ch. 9 - Prob. 55RQE Ch. 9 - Prob. 56RQE Ch. 9 - Prob. 57RQE Ch. 9 - Prob. 58RQE Ch. 9 - int pint = nullptr; pint = new int[100]; //...Ch. 9 - Prob. 60RQE Ch. 9 - Prob. 61RQE Ch. 9 - Prob. 62RQE Ch. 9 - Array Allocator Write a function that dynamically...Ch. 9 - Test Scores #1 Write a program that dynamically...Ch. 9 - Drop Lowest Score Modify Problem 2 above so the...Ch. 9 - Test Scores #2 Modify the program of Programming...Ch. 9 - Prob. 5PC Ch. 9 - Case Study Modification #1 Modify Program 9-19...Ch. 9 - Case Study Modification #2 Modify Program 9-19...Ch. 9 - Mode Function In statistics, the mode of a set of...Ch. 9 - Median Function In statistics, when a set of...Ch. 9 - Reverse Array Write a function that accepts an int...Ch. 9 - Array Expander Write a function that accepts an...Ch. 9 - Element Shifter Write a function that accepts an...Ch. 9 - Movie Statistics Write a program that can be used...

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int x, *ptr = nullptr; *ptr = &amp;x;

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Chapter 9 Solutions

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int x, ptr = nullptr; ptr = &x;