C ++ tips

2008-1-15

1. Basic Structure
Int main (INT argc, char * agrv [])

2. Basic Input and Output
Include <iostream>
Using namespace STD;
Cin>
Cout <

3. Loop Input and Output
While (! Cin. EOF ())

4. Structure Problems
If you want to call other functions in main,
Method 1: Write the function in front
Method 2: declare the function before the main function

5 shift problems
A <1; does not change the value of.

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2008-1-16

1 int to string
# Include <sstream>

Stringstream SS;
SS <num;
Const char * cstring = ss. STR (). c_str ();

2. Define the array type
Typedef int sheet [2] [2];

Sheet;

A [0] [1] = 10;

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2008-1-17

1 string
String can be summarized and used
Getline (CIN, string)
String: Find ()
String: substr ()
String: c_str ()
String: length ()

Char * STR = new char [N]
Cin> STR;
New

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1. Enum
{, //, Separated by numbers
// The last one is not added,
}

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2008-1-21

1. When the pointer encounters an array
Use a pointer to point to an element in the array.
Int A [3] = {1, 2, 3 };
Int * temp = a + 2;

Point the pointer to an element in the array as a parameter.
Int * temp;
Fun (temp );

Void fun (int * & I) {I = a + length ;}
* & Sequence cannot be changed

Class 2 is over ";"

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2008-1-22

1 encounter pointer Array
Mylink ** link;
Link = new mylink [10]; // Error
Link = new mylink * [10]; // correct

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1 error c2236: Unexpected "class "...
After Enum, there are fewer semicolons.

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2008-7-25

Struct Structure

Defines a struct structure.
Struct _ Structure {int index; char * STR} structure;
There is a linked list array,
Structure *;
First, allocate the specified length of things,
A = malloc (sizeof (structure) * n );
Then you can use it directly?
A [0]. Index = 1;
A [0]. Str

Pointer to pointer
Int ** PTR;
PTR = (INT **) malloc (sizeof (int *) * 10 );