Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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In c++language Please only answer questions c, it’s related to question a and b
(a) Write a function which returns true if a C-string contains a given character, false
if the character is not present. Its exact declaration should be:
bool contains_char(char cstring[], char target)
The function should contain no cout statements.
You may use strlen, but not strchr or std::string.find.
Here are some test cases:
• contains char("", ’ a') → false
• contains_char("a", 'a') → true
• contains_char("hello", 'h’) → true
• contains_char("hello", 'e') H true
• contains_char("hello", 'o') → true
• contains_char("hello", '!’) H false
(b) Write a function which determines if a given C-string is a valid password, that is,
if it meets all of the following criteria:
• length between 8 and 30 characters
• contains the character '*' or '!’
For full credit, this function must call contains char in its implementation. Its
exact declaration should be:
bool is good_password (char cstring [])
The function should contain no cout statements.
Here are some test cases:
• is good password ("") false
• is-good-password("hello") → false
• is-good.password ("hello!") false
• is good.password("h*1loworld") true
• is-good-password("!helloworld") true
expand button
Transcribed Image Text:(a) Write a function which returns true if a C-string contains a given character, false if the character is not present. Its exact declaration should be: bool contains_char(char cstring[], char target) The function should contain no cout statements. You may use strlen, but not strchr or std::string.find. Here are some test cases: • contains char("", ’ a') → false • contains_char("a", 'a') → true • contains_char("hello", 'h’) → true • contains_char("hello", 'e') H true • contains_char("hello", 'o') → true • contains_char("hello", '!’) H false (b) Write a function which determines if a given C-string is a valid password, that is, if it meets all of the following criteria: • length between 8 and 30 characters • contains the character '*' or '!’ For full credit, this function must call contains char in its implementation. Its exact declaration should be: bool is good_password (char cstring []) The function should contain no cout statements. Here are some test cases: • is good password ("") false • is-good-password("hello") → false • is-good.password ("hello!") false • is good.password("h*1loworld") true • is-good-password("!helloworld") true
• is good password("!helloworld") → true
(c) Write a main function which prompts the user to set a new password. The password
should be read as a single token (i.e. containing no whitespace) from the standard
input. The user should be prompted repeatedly, until the supplied password con-
forms to the rules. For full credit, the main function must call the functions from
(a) and (b), either directly or indirectly.
Sample user session:
> Enter a password which contains one of the characters
length between 8 and 30 characters:
> hello
> hello!
> !helloworld
> New password: !helloworld
or '!' with
expand button
Transcribed Image Text:• is good password("!helloworld") → true (c) Write a main function which prompts the user to set a new password. The password should be read as a single token (i.e. containing no whitespace) from the standard input. The user should be prompted repeatedly, until the supplied password con- forms to the rules. For full credit, the main function must call the functions from (a) and (b), either directly or indirectly. Sample user session: > Enter a password which contains one of the characters length between 8 and 30 characters: > hello > hello! > !helloworld > New password: !helloworld or '!' with
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