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Luhn test of credit card numbers: Difference between revisions

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Luhn test of credit card numbers (view source)

Revision as of 19:50, 29 August 2021

3,636 bytes added ,  2 years ago
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→‎{{header|Phix}}: added syntax colouring the hard way
m (→‎{{header|Phix}}: added syntax colouring the hard way)
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=={{header|Phix}}==
<!--<lang Phix>function Luhn(string stphixonline)-->
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
integer s=0, d
<span style="color: #008080;">function</span> <span style="color: #000000;">Luhn</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">st</span><span style="color: #0000FF;">)</span>
for i=1 to length(st) do
<span style="color: #004080;">integer</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">d</span>
d = st[i]-'0'
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">st</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
s += iff(mod(i,2)?d,d*2-(d>4)*9)
<span style="color: #000000;">d</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">st</span><span style="color: #0000FF;">[-</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]-</span><span style="color: #008000;">'0'</span>
end for
<span style="color: #000000;">s</span> <span style="color: #0000FF;">+=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">2</span><span style="color: #0000FF;">)?</span><span style="color: #000000;">d</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d</span><span style="color: #0000FF;">*</span><span style="color: #000000;">2</span><span style="color: #0000FF;">-(</span><span style="color: #000000;">d</span><span style="color: #0000FF;">></span><span style="color: #000000;">4</span><span style="color: #0000FF;">)*</span><span style="color: #000000;">9</span><span style="color: #0000FF;">)</span>
return remainder(s,10)=0
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
end function
<span style="color: #008080;">return</span> <span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">10</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
procedure test(string s)
printf(1,"%20s : %s\n",{s,iff(Luhn(reverse(s))?"OK":"FAIL")})
<span style="color: #008080;">procedure</span> <span style="color: #000000;">test</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span>
end procedure
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%20s : %t\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">Luhn</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)})</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
test("49927398716")
test("49927398717")
<span style="color: #7060A8;">papply</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"49927398716"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"49927398717"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"1234567812345678"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"1234567812345670"</span><span style="color: #0000FF;">},</span><span style="color: #000000;">test</span><span style="color: #0000FF;">)</span>
test("1234567812345678")
test("1234567812345670")<!--</lang>-->
{{out}}
<pre>
49927398716 : OKtrue
49927398717 : FAILfalse
1234567812345678 : FAILfalse
1234567812345670 : OKtrue
</pre>
 
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