progs/collatz.while
author Christian Urban <christian dot urban at kcl dot ac dot uk>
Wed, 30 Oct 2013 15:14:14 +0000
changeset 172 47b5c91eff47
parent 147 4725bba8ef26
permissions -rw-r--r--
added
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
147
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     1
write "Input a number ";
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     2
read n;
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     3
while n > 1 do {
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     4
  if n % 2 == 0 
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     5
  then n := n/2 
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     6
  else n := 3*n+1;
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     7
};
4725bba8ef26 added slides
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
diff changeset
     8
write "Yes";