Data types, variable constants, operators

1, binary conversion

X-binary conversion to decimal weighted sum

Decimal conversion to X-binary to even remove the rewind remainder

2. Basic data type

3. Constant variables

Constants: Values that cannot be changed during a program run

Variable: A variable represents a storage area, the value of a storage area is the value of a variable, and the value of the variable can be changed during operation.

4. Operators

4.1 + +--arithmetic

b = a++; equivalent to B = A; A = a + 1;

b = ++a; equivalent to a = a + 1; b = A;

The operator is preceded by a line, the operator is followed, and then the line is followed.

4.2 Exchange two-digit value

5. Expression (must have result)

6. Input/Output function

scanf ("%d%d", A, b) considerations:

1,%d%d can have a comma, but the middle of the input value also need a comma, and the double quotation mark and%d can not have spaces.

2, only big return to end the input.

3. Cannot add \ n

\ print \ percent Print%

Data types, variable constants, operators