C ++ Study Notes (1) -- C ++ getting started

Chapter 1
, Quick Start

1.1. Simple
C ++
Program

1,
Main
Function is
(
Unique
)
The returned value of a function that is displayed and called by the operating system must be
Int
Type.

1.2 Input and Output

1,
Iostream
The basis of the database is
Istream
And
Ostream
Two classes. Four classes are defined in the standard library.
Io
Object, which is
CIN
,
Cout
,
Cerr
,
Clog
, Where
Clog
General information used to generate program execution.

2.
<
Operator, which accepts two operands. The left operand must be
Ostream
Object, which writes operations
Ostream
Object;
>
Operator that accepts two operands. The value on the left must be
Istream
Object from
Istream
The read data is stored in the right operand. Both return their left operands.

3.
C ++
.

1.3 comments
(
No Important Content
....)

1.4 Control Structure

1. When using
Istream
When an object is used as a condition, the result is the status of the test flow. If the stream is valid
(
That is, it is possible to read the next input.
)
, The test is successful. If a file terminator or invalid input is encountered
Istream
Invalid.

1.5 class Introduction

1,
Endl
The function is to refresh the buffer.

 

(To be continued)