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POProject Euler #8
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20710051
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20710098
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2
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2013-12-20T18:43:02.450
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2015-01-22T13:11:14.387
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2015-01-22T13:11:14.387
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1
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0
ViewCount
923
LastEditorDisplayName
text
Body
I tried to solve the problem on my own but got stuck after a while so looked at the solution.<a href="http://projecteuler.net/problem=8" rel="nofollow">Question #8</a>. And this is what I got. <pre><code>#include <stdio.h> int main(void) { char str[] = "73167176531330624919225119674426574742355349194934" "96983520312774506326239578318016984801869478851843" "85861560789112949495459501737958331952853208805511" "12540698747158523863050715693290963295227443043557" "66896648950445244523161731856403098711121722383113" "62229893423380308135336276614282806444486645238749" "30358907296290491560440772390713810515859307960866" "70172427121883998797908792274921901699720888093776" "65727333001053367881220235421809751254540594752243" "52584907711670556013604839586446706324415722155397" "53697817977846174064955149290862569321978468622482" "83972241375657056057490261407972968652414535100474" "82166370484403199890008895243450658541227588666881" "16427171479924442928230863465674813919123162824586" "17866458359124566529476545682848912883142607690042" "24219022671055626321111109370544217506941658960408" "07198403850962455444362981230987879927244284909188" "84580156166097919133875499200524063689912560717606" "05886116467109405077541002256983155200055935729725" "71636269561882670428252483600823257530420752963450"; size_t len = sizeof str - 1; size_t i; unsigned max = 0; for (i = 0; i < len-4; i++) { unsigned p = 1; size_t j; for (j = 0; j < 5; j++) { p *= (unsigned)(str[i+j]-'0'); } if (p > max) { max = p; } } printf("%u\n", max); return 0; } </code></pre> My Problem : I didn't understand why there was -'0' in this line <pre><code> p *= (unsigned)(str[i+j]-'0'); </code></pre> Sorry if my question is very stupid. But I can't seem to figure it out.
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<c>
Title
Project Euler #8
singulars
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1. PO
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USMartijn Pieters
UserOwnerUserId
1. USSaurabh Rana
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1. PO
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