C language operator

Here, for beginners to the C language of the small partners to introduce several basic operators.  Hope that everyone's study has helped! 1. Arithmetic operator "+ (plus)", "-(minus)", "* (multiply)", "/(except)", "% (take-up)", which focuses on "%" to take the remainder operation, simply lift

instance, 12%5=2, however, be aware that both sides of a symbol must be shaped data.

  2. Shift operator

    << (shift left) ">> (Shift right)", the shift is for 2 decimal digits. The right shift is divided into two cases: arithmetic right shift and logical right SHIFT, arithmetic right shift

Simple generalization: Left fill sign bit, right shift. And the logical right shift is: left 0, right shift. Take 1 as an example to illustrate:

Arithmetic shift

, Logical shift

While the left shift is relatively simple, there is only one case, right 0, left shift.

3. Bitwise operators

  "& (Bitwise AND)" "| (bitwise OR)" "^ Bitwise XOR", for binary number operations, as follows:

3|5=7

4. Assignment Operator "="

  To put it briefly, for example, a+=10, that is, A=A+10, both express the same meaning, obviously the former is more concise, we recommend that we use the former in the subsequent programming.

5. Single-Mesh operator (one of the required variables for the operation)

  “！ (non) "& (Address)" "sizeof" and so on. Here is a brief introduction to sizeof, commonly used to solve array lengths, such as sizeof (a)

/sizeof (A[0]), but be aware that sizeof is an operator, not a function. In addition, in a nutshell, sizeof is calculated during compilation, and the runtime does not

It's going to be an operation.

6. Relational operators

  "&& (with)" "| | (or) "and so on, where the bitwise operators are distinguished, and the relational operators represent logical operational relationships, such as

0&& (a+10) |26-14, for this equation, see there is a && behind 0, there is no need to look down, because in the computer, this time the operation has stopped, the result

For 0, the same, 1| | (A+10) &&26-14 is 1.

In this, simple for you to introduce the C language operator, I hope you read well, there will be a harvest of Europe!!!

C language operator