Primitive types and operations. Kamill Gusmanov @GusmanovKamill

Сентябрь 7, 2022

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Primitive types and operations. Kamill Gusmanov @GusmanovKamill

Содержание

2. Fibonacci number 1, 1, 2, 3, 5, 8, 13, 21…
3. How much Fibonacci number fit into: Byte?
4. How much Fibonacci number fit into: Byte? Short?
5. How much Fibonacci number fit into: Byte? Short? Int?
6. How much Fibonacci number fit into: Byte? Short? Int? Long?
7. Random numbers Unfortunately, this code is returning binary numbers as decimal integers, and you cannot fix
8. Arrays Initialize array with Pascal triangle. Print it to the screen.
9. String
10. Advanced 1. Multiply floating point numbers by 2 without floating point multiplication, but using bitwise operations
11. Advanced 2. Numerical integration. Integrate f(x) = x^4 on the interval from -1000 to 0. Use
13. Скачать презентацию

Слайд 2

Fibonacci number
1, 1, 2, 3, 5, 8, 13, 21…

Слайд 3

How much Fibonacci number fit into:
Byte?

Слайд 4

How much Fibonacci number fit into:
Byte?
Short?

Слайд 5

How much Fibonacci number fit into:
Byte?
Short?
Int?

Слайд 6

How much Fibonacci number fit into:
Byte?
Short?
Int?
Long?

Слайд 7

Random numbers
Unfortunately, this code is returning binary numbers as decimal integers,

and you cannot fix the library itself, but you can write a fix, that takes the result of the function and converts it into regular integer. Use % and >> operations to complete the task.

Слайд 8

Arrays
Initialize array with Pascal triangle. Print it to the screen.

Слайд 9

String

Слайд 10

Advanced
1. Multiply floating point numbers by 2 without floating point multiplication,

but using bitwise operations and Double.longBitsToDouble(long), Double.doubleToRawLongBits(double)

long ld = Double.doubleToLongBits(d);
long sign = ld >> 63;
long exp = (ld >> 52) & 0x7FF;
long mantissa = ld & 0xFFFFFFFFFFFFFL;
System.out.println(sign);
System.out.println(exp - 1023);
System.out.println(1.0 + mantissa);

Слайд 11

Advanced
2. Numerical integration. Integrate f(x) = x^4 on the interval from

-1000 to 0. Use double.