Brainfuck

+-,.[]

variable name x, y, temp0, temp1,... should be replaced by< or > to move to its position in real code
temp prefix: temporary cell initialize to 0
Code prefix: code block

most code might consume the input.
use copy value to copy the input if necessary

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  • copy value
  • arithmetic
  • logic gate
  • compare
  • condition
  • reference

copy value

• set y as a copy of x

x[y+temp0+x-]
temp0[x+temp0-]    // x = temp0

arithmetic

• x = 0

x[-]

• y = x

x[y+x-]

• z = x+y

x[z+x-]
y[z+y-]

• z = x-y

x[z+x-]
y[z-y-]

• z = x*y

x[
    y[
        z+temp0+
    y-]
    temp0[y+temp0-]    // y = temp0
x-]

• z = x/y

logic gate

• y = NOT x

x[y-x-]y+

compare

• z = (x > y)

condition

reference

• https://esolangs.org/wiki/Brainfuck_constants
• https://esolangs.org/wiki/Brainfuck_algorithms