Access in cpp classes
Posted on August 14, 2008
(Last modified on August 7, 2020)
| 3 minutes
| Kinshuk Chandra
When a base class is inherited as private, all public and protected members of that class
become private members of the derived class. However, in certain circumstances, you
may want to restore one or more inherited members to their original access
specification. For example, **you might want to grant certain public members of the base
class public status in the derived class even though the base class is inherited as private.
[Read More]Escape characters and printf
Posted on August 13, 2008
(Last modified on August 7, 2020)
| 1 minutes
| Kinshuk Chandra
Escape Sequence
Character represented
\n
newline
\t
tab
\\
backslash itself
\’
quote ``’’’
\”
double quote ``”’’
For example,
printf("\\t\\"My name is \\'%s\\'\\"\\n", "Jim");
```Which prints
“My name is ‘Jim’”
I/O in c without printf and scanf.
Posted on August 13, 2008
(Last modified on August 7, 2020)
| 1 minutes
| Kinshuk Chandra
Problem
I/O in c without printf and scanf.
Method 1 - getchar and putchar
int getchar();
int putchar(int value);
Sample Program
#include <stdio .h> int main(void) { int c; while ((c = getchar()) != EOF) { putchar(c); } return 0; } Note the use of parentheses. c=gethar()!=EOF implies whether c = 0 or 1 depending on whether character get is not EOF or is EOF. EOF is 257 , so use int rather than char.
[Read More]C preprocessor
Posted on August 8, 2008
(Last modified on August 7, 2020)
| 15 minutes
| Kinshuk Chandra
The C preprocessor (cpp) is the preprocessor for the C programming language. In many C implementations, it is a separate program invoked by the compiler as the first part of translation. The preprocessor handles directives for source file inclusion (#include), macro definitions (#define), and conditional inclusion (#if). The language of preprocessor directives is not strictly specific to the grammar of C, so the C preprocessor can also be used independently to process other types of files.
[Read More]Complicated Declaration
Posted on August 7, 2008
(Last modified on August 7, 2020)
| 1 minutes
| Kinshuk Chandra
Function Declaration
Function
Returning
Accepting
int *f();
int ptr
any number of arg in c and no arg in cpp
char(*(*f())[10])();
pointer to the array of pointers to function
int (*(*f())[10]) ()
pointer to the array of 10 pointers to function that returns integer
Pointer
Expression
p is the pointer to
int *p;
iint **p;
int (*p)();
function that returns the integer
int (*p)[30]
array of 30 int
Program string class
Posted on August 7, 2008
(Last modified on August 7, 2020)
| 8 minutes
| Kinshuk Chandra
Program String Class(Source Code)
// Program Ch03pr06
// Program string class
#include
#include
#include
class string
{
private :
char *str ;
public :
string( ) ;
string ( char *s ) ;
string ( string& s ) ;
int length( ) ;
char operator [] ( int index ) ;
void operator = ( string s ) ;
string operator + ( string s ) ;
[Read More]Pattern matching program using Brute Force Algorithm
Posted on August 7, 2008
(Last modified on August 7, 2020)
| 2 minutes
| Kinshuk Chandra
Pattern matching program using Brute Force Algorithm(Source Code)
// Program Example Ch03pr05
// Pattern matching program using Brute Force Algorithm
#include
#include
#include
const int MAX = 20 ;
class string
{
private :
char str[MAX] ;
public :
string( ) ;
string ( char *s ) ;
static int xstrsearch ( string &s1, string &s2 ) ;
void show( ) ;
} ;
// initializes data
[Read More]Program to manage array of pointers to strings
Posted on August 7, 2008
(Last modified on August 7, 2020)
| 1 minutes
| Kinshuk Chandra
Program to manage array of pointers to strings (Source Code)
// Program Ch03pr04
// Program to manage array of pointers to strings
#include
#include
#include
const int MAX1 = 6 ;
const int MAX2 = 10 ;
class string
{
private :
char *names[MAX1] ;
int count ;
public :
string( ) ;
int add( ) ;
void show( ) ;
~string( ) ;
} ;
// allocates the memory
[Read More]Program with the use of array of pointers to strings
Posted on August 7, 2008
(Last modified on August 7, 2020)
| 2 minutes
| Kinshuk Chandra
Program with the use of array of pointers to strings(Source Code)
// Program: Ch03pr03
// Program with the use of array of pointers to strings
#include
#include
#include
const int MAX = 6 ;
class string
{
private :
char *names[MAX] ;
int count ;
public :
string( ) ;
int add ( char *s ) ;
void swap ( int i, int j ) ;
void show( ) ;
[Read More]Program to manage a 2-D array of Characters
Posted on August 7, 2008
(Last modified on August 7, 2020)
| 2 minutes
| Kinshuk Chandra
Program to manage a 2-D array of Characters(Source Code)
// Program Ch03pr02
// Program to manage a 2-D array
#include
#include
const int MAX1 = 6 ;
const int MAX2 = 10 ;
class string
{
private :
char masterlist[MAX1][MAX2] ;
int count ;
public :
string( ) ;
int add ( char *s ) ;
int find ( char *s ) ;
} ;
// initialises the data
[Read More]