How to resolve the algorithm Rock-paper-scissors step by step in the Fortran programming language

Published on 12 May 2024 09:40 PM

How to resolve the algorithm Rock-paper-scissors step by step in the Fortran programming language

Table of Contents

Problem Statement

Implement the classic children's game Rock-paper-scissors, as well as a simple predictive   AI   (artificial intelligence)   player. Rock Paper Scissors is a two player game. Each player chooses one of rock, paper or scissors, without knowing the other player's choice. The winner is decided by a set of rules:

If both players choose the same thing, there is no winner for that round. For this task, the computer will be one of the players. The operator will select Rock, Paper or Scissors and the computer will keep a record of the choice frequency, and use that information to make a weighted random choice in an attempt to defeat its opponent.

Support additional choices   additional weapons.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Rock-paper-scissors step by step in the Fortran programming language

Source code in the fortran programming language

! compilation
! gfortran -std=f2008 -Wall -ffree-form -fall-intrinsics -fimplicit-none f.f08 -o f
!
! EXAMPLE
!
!$ ./f
!rock, paper, scissors?  papier
!scoring computer choice (r) and your choice (p)
!rock, paper, scissors?  sizzerz
!scoring computer choice (s) and your choice (s)
!rock, paper, scissors?  quit
!scoring computer choice (r) and your choice (q)
! Who's keeping score anyway???
!  0.5  1.5
! you won!
!$ 



program rpsgame

  integer, parameter :: COMPUTER=1, HAPLESSUSER=2
  integer, dimension(3) :: rps = (/1,1,1/)
  real, dimension(3) :: p
  character :: answer, cc ! computer choice
  integer :: exhaustion, i
  real, dimension(2) :: score = (/0, 0/)
  character(len=8), dimension(3) :: choices = (/'rock    ','paper   ','scissors'/)
  real :: harvest
  do exhaustion = 1, 30
    p = rps/real(sum(rps))
    p(2) = p(2) + p(1)
    p(3) = p(3) + p(2)
    call random_number(harvest)
    i = sum(merge(1,0,harvest.le.p)) ! In memory of Ken Iverson, logical is more useful as integer.
    cc = 'rsp'(i:i)
    write(6, "(2(A,', '),A,'?  ')", advance='no')(trim(choices(i)),i=1,size(choices))
    read(5, *) answer
    write(6, "('scoring computer choice (',A,') and your choice (',A,')')")cc,answer
    if (answer.eq.cc) then
      score = score + 0.5
    else
      i = HAPLESSUSER
      if (answer.eq.'r') then
        if (cc.eq.'p') i = COMPUTER
      else if (answer.eq.'p') then
        if (cc.eq.'s') i = COMPUTER
      else if (answer.eq.'s') then
        if (cc.eq.'r') i = COMPUTER
      else
        exit
      endif
      score(i) = score(i) + 1
    end if
    i = scan('rps',answer)
    rps(i) = rps(i) + 1
  end do
  if (25 .lt. exhaustion) write(6, *) "I'm bored out of my skull"
  write(6, *)"Who's keeping score anyway???"
  write(6, '(2f5.1)') score
  if (score(COMPUTER) .lt. score(HAPLESSUSER)) print*,'you won!'
end program rpsgame


$ yes r | ./f                                                         # rock
rock, paper, scissors?  scoring computer choice (r) and your choice (r)
rock, paper, scissors?  scoring computer choice (s) and your choice (r)
rock, paper, scissors?  scoring computer choice (r) and your choice (r)
...
rock, paper, scissors?  scoring computer choice (p) and your choice (r)
 I'm bored out of my skull
 Who's keeping score anyway???
 25.5  4.5
yes: standard output: Broken pipe
yes: write error
$ yes p 2>/dev/null | ./f                                             # paper
rock, paper, scissors?  scoring computer choice (r) and your choice (p)
rock, paper, scissors?  scoring computer choice (s) and your choice (p)
rock, paper, scissors?  scoring computer choice (r) and your choice (p)
rock, paper, scissors?  scoring computer choice (s) and your choice (p)
...
rock, paper, scissors?  scoring computer choice (s) and your choice (p)
 I'm bored out of my skull
 Who's keeping score anyway???
 25.5  4.5
$ yes scissors 2>/dev/null | ./f                                      # scissors
rock, paper, scissors?  scoring computer choice (r) and your choice (s)
rock, paper, scissors?  scoring computer choice (r) and your choice (s)
...
rock, paper, scissors?  scoring computer choice (r) and your choice (s)
 I'm bored out of my skull
 Who's keeping score anyway???
 26.5  3.5
$


  

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