C++ learning summary of data types and conversion

  • 2020-04-02 03:08:14
  • OfStack

I. input/output statements

The Console. ReadLine (); It waits until the user presses enter, reading in one line at a time
The Console. ReadKey (); Waiting for the user to press any key and read in one character at a time.

2. Data type

Main skills:

Value types: int, float, double, char,bool Boolean, datetime   Date/time

2. Reference type: string string type

The problem?

A. The difference between string and character: string type USES "", char USES" ", can say that a string is a collection of characters. Eg: string s = "ABC"; Char s1 = 'a', 'b', 'c'.

B. Difference between value type and reference type: value type is cash, which should be used directly; Reference type is the passbook, to use still have to go to the bank to withdraw first.

Three, the conversion mode

1. Implicit conversion: include relationships. Small range can be turned into a large range.

2. Explicit conversion

A. turn with (). Int a; Double b; A, b = (int).

B. use the convert. Int a; Float b; A = the convert. ToInt32 (b); Focus.

C. use the parse. Int a; Double b; A = int. Parse (b);

Four, operators.

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