OpenEuphoria

length() and looping

• Posted by jessedavis Mar 10, 2017
• 1459 views

4.0.5 (362497032f33, 2012-10-11)

Can anyone explain the behavior of the following code? What am I missing?

include std/console.e 
 
 
sequence data = {} 
for i = 1 to 5 do 
data = append(data,64 + i) 
end for 
 
for i = 1 to 5 do 
	printf(1,"%d  %s\n",{i,data[i]}) 
end for 
any_key()		--stops program and awaits <cr> 
for i = 1 to length(data)/2 do	--length(data)/2 = 2, so... 
				-- for i = 1 to 2 do 
	printf(1,"%d  %s\n",{i,data[i]}) 
end for 
any_key() 
printf(1,"First time: length(data) = %d\n\n",length(data)) 
for i = length(data)/2 + 1 to length(data) do	--for i = 3 to 5 do 
	printf(1,"%d  %s\n",{i,data[i]})	 
end for 
printf(1,"\nSecond time: length(data) = %d\n",length(data)) 
any_key() 
puts(1,"Now for the finale!\n") 
for i = 1 to 5 do 
	printf(1,"%d  %s\n",{i,data[i]}) 
end for 
puts(1, "I seem to have misplaced the letter E!\n") 
any_key() 
 

1  A 
2  B 
3  C 
4  D 
5  E 
 
1  A 
2  B 
First time: length(data) = 5 
 
3  C 
4  D 
 
Second time: length(data) = 5 
 
Now for the finale! 
1  A 
2  B 
3  C 
4  D 
5  E 
I seem to have misplaced the letter E!