Giáo trình C++ - Ngành CNTT - Part 08

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Slide 1
Chapter 8
Overview
8.1
An Array Type for Strings
C-string Details
C-string Declaration
Initializing a C-string
C-string error
Don't Change '0'
Safer Processing of C-strings
Assignment With C-strings
Assignment of C-strings
A Problem With strcpy
A Solution for strcpy
== Alternative for C-strings
strcmp's logic
More C-string Functions
The strncat Function
Display 8.1 (1/2)
Display 8.1 (2/2)
C-strings as Arguments and Parameters
C-string Output
C-string Input
Reading an Entire Line
Using getline
getline wrap up
getline and Files
getline syntax
C-String to Numbers
C-strings to Integers
C-string to long
C-string to double
Library cstdlib
Numeric Input
Display 8.2 (1/2)
Display 8.2 (2/2)
Confirming Input
Display 8.3 (1/3)
Display 8.3 (2/3)
Display 8.3 (3/3)
Section 8.1 Conclusion
8.2
The Standard string Class
Assignment of Strings
Using + With strings
string Constructors
Mixing strings and C-strings
Display 8.4
I/O With Class string
getline and Type string
getline Example
Character Input With strings
Display 8.5 (1/2)
Display 8.5 (2/2)
Another Version of getline
getline Returns a Reference
getline Declarations
Mixing cin >> and getline
ignore
String Processing
Display 8.6
Member Function length
Member Function at
Display 8.7
Comparison of strings
Program Example: Palindrome Testing
Palindrome Testing: remove_punct
Palindrome Testing: substr
Palindrome Testing: The Program
Display 8.8 (1/4)
Display 8.8 (2/4)
Display 8.8 (3/4)
Display 8.8 (4/4)
string Objects to C-strings
Converting strings to C-strings
8.3
Vectors
Accessing vector Elements
Initializing vector Elements
The size Of A vector
The Type unsigned int
Alternate vector Initialization
Vector Initialization With Classes
The vector Library
Display 8.9
vector Issues
vector Efficiency
Controlling vector Capacity
Chapter 8 -- End

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[...]... Education, Inc Publishing as Pearson Addison-Wesley Slide 8- 19 Display 8.1 (1/2) Copyright © 2007 Pearson Education, Inc Publishing as Pearson Addison-Wesley Back Next Slide 8- 20 Display 8.1 (2/2) Copyright © 2007 Pearson Education, Inc Publishing as Pearson Addison-Wesley Back Next Slide 8- 21 C-strings as Arguments and Parameters   C-string variables are arrays C-string arguments and parameters are... function changes the value of a C-string parameter, it is best to include a parameter for the declared size of the C-string  If a function does not change the value of a C-string parameter, the null character can detect the end of the string and no size argument is needed Copyright © 2007 Pearson Education, Inc Publishing as Pearson Addison-Wesley Slide 8- 22 C-string Output  C-strings can be output with... Addison-Wesley Slide 8- 15 == Alternative for C-strings  The = = operator does not work as expected with C-strings  The predefined function strcmp is used to compareC-string variables  Example: #include … if (strcmp(c_string1, c_string2)) cout . s[9] H i M o m ! ? ? C-string Details Slide 8- 7 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley C-string Declaration  To declare a C-string variable, use the. work with C-strings Slide 8- 13 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Assignment of C-strings  A common method to assign a value to a C-string variable. needed by '' Slide 8- 8 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Initializing a C-string  To initialize a C-string during declaration: char

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