Finding in C Is there such an operator in C?

Using Liu Hui's "circumcision" formula, I calculated pi——

# include

# include

main()

double pi = 3;

unsigned int i;

for (i=1; i<15; i++)

pi = sqrt(pi) +2;

pi = sqrt(2 - sqrt(pi));

for (i=0; i<15; i++)

pi *= 2;

pi *= 3;

printf("pi = %.10lf", pi);

The calculation is relatively accurate.

Upstairs is incisive, if you want to control it within 1 you might as well divide the x by 10000 and don't forget the float or double

Yes, but less commonly.

The bitwise XOR operator " " is a binocular operator. Its function is that the binaries corresponding to the two numbers involved in the operation are different or, when the two corresponding binaries are different, the result is 1. For example, if m=9 (binary 1001) and n = 12 (binary 1100), then m n results in 5 (binary 0101).

Integers are represented by binary bits in computers, and C provides some operators that can directly manipulate bits in integers, called bit operations, and the operands of these operators must be integer. The bitwise XOR operator " " is a binocular operator. Its function is that the binaries corresponding to the two numbers involved in the operation are different or, when the two corresponding binaries are different, the result is 1.

Classification and level.

C operators are mainly used to form expressions, and the same symbol does not serve the same purpose in different expressions. The following describes the expressions for different roles in order of precedence of the calculations. It is important to note that there is no such thing as a binding language in the C language standard.

The same priority operator, from left to right. Note that the suffix operation takes precedence over the prefix. Therefore ++i++ should be interpreted as ++ (i++).

The priority of the operation is not the same as or not, so a &&b ||b &&c is interpreted as (a &&b) |b &&c)

Rational use of precedence can greatly simplify expressions.

Too to use its arithmetic binary bitwise XOR ratio.

a = 9 (binary 1001) b = 12 (binary 1100) a b junction 5 (binary 0101).

In general, computer text is used to represent a certain number, a few C, and the speech does not represent a few operators.

In the C language, the arithmetic operator "%" represents the modulo (remainder) operation, "+ represents the variable self-increment operation", and "-" represents the variable self-subtraction operation.

1. Modulo operation "%".

"Modulus" is the transliteration of "mod", and modulo operation is mostly used in program writing. The mod stands for remainder. Modular operations have a wide range of applications in number theory and programming, from the discrimination of odd and even numbers to the discrimination of prime numbers, from the modular exponentiation operation to the method of finding the greatest common divisor, from the Sun Tzu problem to the Caesar cipher problem, all of which are full of modular operations.

C uses "%" for modular operations, e.g. %5=3, etc.

2. Self-increment operation "++".

C language uses "++ to represent the auto-increment operation, which is divided into prefix auto-increment and suffix auto-increment, and its effect is its own variable value +1. The prefix is self-incrementing, e.g. "a=5; b=++a;", the result is "a=6,b=6". The suffix is self-incrementing, e.g. "a=5; b=a++;The result is "a=6,b=5".

3. Self-subtraction operation"--

C language uses "--to represent self-reduction operations, which are divided into prefix self-reduction and suffix self-reduction, and their effects are all self-variable values -1. The prefix is self-subtracted, e.g. "a=5; b=--a;", the result is "a=4,b=4". The suffix is self-reduced, e.g. "a=5; b=a--;The result is "a=4,b=5".

Bitwise with |Bitwise or

Bitwise XOR negates <<

Shift Left >> Shift Right <<

1.Bitwise vs. arithmetic. Bitwise and operators"&"is a binocular operator.

Its function is the binary phase sum corresponding to each of the two numbers involved in the operation. The resulting bit is 1 only when both corresponding binary digits are 1, otherwise it is 0. The numbers involved in the operation appear as complements.

2.Bitwise or arithmetic. Bitwise or operator "|is a binocular operator.

Its function is the binary phase or corresponding to each of the two numbers involved in the operation. As long as one of the corresponding two binary digits is 1, the resulting digit is 1. Both numbers involved in the operation appear as complements.

For example: 9|5. The writable equation is as follows: 00001001|00000101 00001101 (13 in decimal) shows 9|5=13 main()

3.Bitwise XOR operations. The bitwise XOR operator " " is a binocular operator.

Its function is that the binaries corresponding to the two numbers involved in the operation are different or, when the two corresponding binaries are different, the result is 1. The participating operations still appear as complements, e.g. 9 5 can be written as follows: 00001001 00000101 00001100 (12 in decimal) main().

5.Shift left operations. The shift left operator is a binocular operator.

Its function is to shift all the binary digits of the left operation number to the left, and the number on the right specifies the number of moving digits, discarding the high bits, and making up 0 for the low bits. For example, a<<4 means to move each binary of a by 4 digits to the left.

For example, a=00000011 (decimal 3), after 4 digits to the left, it is 00110000 (decimal 48).

Yes, " is "bit-XOR". In addition, the operator symbols are:

, parentheses, square brackets, pointers, members, logical non, add, decrement.

, monocular operators< , =, =: relational operators.

Yes, but less commonly.

The bitwise XOR operator " " is a binocular operator. Its function is that the binaries corresponding to the two numbers involved in the operation are different or, when the two corresponding binaries are different, the result is 1. For example, if m=9 (binary 1001) and n = 12 (binary 1100), then m n results in 5 (binary 0101).

Generally, it is commonly used to indicate the number of times, and there is no operator in C to represent the "number of times". Because the power of C can be done with a loop. For example:

include references to header files.

Double pow(double x, double y) function.

Indicates that x's power y.

For example, the 5th power can be written as pow( ,5).

Of course, you can also customize the function to find the multiplier, e.g. :

float power( float x,int n ) custom power function.

main()

C is a general-purpose computer programming language with a wide range of applications. C is designed to provide a programming language that can compile in a simple way, handle low-level memory, generate a small amount of machine code, and run without any runtime support.

No. The power operation is generally binary bitwise XOR, e.g. a=9 (binary 1001), b=12 (binary 1100), then the result of a b is 5 (binary 0101).

Some. The name of this operator is called bitwise XOR, i.e., the same is 0The difference is 1

This is a C language operator, which is extended by some special compilation environments, such as CCS. There should be a definition in the programming header file of the microcontroller, for example, p1 2 refers to port 2 of p1, and it is also an operator, "is bitwise XOR", and "is bitwise and", "|It is bitwise or, generally not not used for single-chip microcomputer programming.

There is this operator, which is the factorial operator.

You mean factorial? No, it's binary or arithmetic in C.

However, there is a factorial function in the library, pow(double n, int m) (i.e. n to the m power).

There must be, indicating a bit or an operation.

Some. "^"It is a bitwise XOR operator, and only one of the corresponding bits in the two operations is 1 (not all of them are 1), and the corresponding bits in the values it generates are 1.

The bitwise XOR operator " " is a binocular operator. Its function is that the binaries corresponding to the two numbers involved in the operation are different or, when the two corresponding binaries are different, the result is 1. Bitwise vs. arithmetic.

Bitwise and operators"&"is a binocular operator. Its function is the binary phase sum corresponding to each of the two numbers involved in the operation. The resulting bit is 1 only when both corresponding binary digits are 1, otherwise it is 0.

The numbers involved in the operation appear as complements, so the result is 0

c language operation notation.

Level 1 Priority Left Bond.

Parenthesis. Subscript operator.

Point to the struct member operator.

Struct member operator.

Suffix increment operator.

Suffix increment operator.

Level 2 Priority Right Bond.

Logical non-operators.

Bitwise negation operator.

Prefix increment operator.

Prefix increment operator.

Negative operator.

Type) type conversion operator.

Pointer operator.

Addresses and operators.

sizeof length operator.

Level 3 Priority Left Bond.

Multiplication operators.

Division operator.

Remainder operator.

4 levels of priority Left binding.

Addition operators.

Subtraction operators.

5 levels of priority Left binding.

Shift Left operator.

Shift right operator.

6 levels of priority Left binding.

<=, >, = relational operators.

7 levels of priority Left binding.

Equals operator.

Not equal to the operator.

8 levels of priority Left binding.

Bitwise and operators

9 levels of priority Left binding.

Bitwise XOR operators.

10 levels of priority Left binding.

Bitwise or operator "|

11 levels of priority Left binding.

Logic and operators.

12 levels of priority Left binding.

Logic or operators.

13 levels of priority right binding.

Conditional operators.

14 levels of priority right binding.

= -= *= /= %= &= ^= |= <<= >>= are all assignment operators.

15 levels of priority Left binding.

Comma operator.

The solution process of lnxdx=xlnx-x+c (c is any real number) is as follows:

x*lnx - x d(lnx)

x*lnx - x*1/x*dx

x*lnx - dx

x*lnx - x + c (c is an arbitrary real number) <>