Mad son C + + notes,

Mad son C + + notes

1.c++ input, output, header file interpretation

#include <iostream>

using namespace Std;

int Mian ()

{

　　cout << "Thie is a C + + program";

return 0;

}

Program Run Result: Thie is a C + + programs

(1) The function of "<<" is to insert the contents of the quotation marks into the output queue cout (the output queue is also referred to as the "output stream") equivalent to printf in the C language.

(2) Standard C + + stipulates that the main function must be declared int.

(3) The normal execution of the program, the first system returns the value 0;

(4) The role of file iostream is to provide the program with some information needed to input and output.

(5) ">>" input stream object. such as (int A, a, cin >> a >> b; the first input is assigned to a, the second input is assigned to B)

(6) cout << "A + b =" << sum << Endl; ("Endl: newline, and end line abbreviation")

(7)

#include <iostream>

using namespace Std;

Equivalent to

#include <iostream.h>

2. Class

Mad son C + + notes,