ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change
on this file since 807a632 was
67982887,
checked in by Peter A. Buhr <pabuhr@…>, 6 years ago
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specialize thesis directory-names
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Property mode set to
100644
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File size:
745 bytes
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1 | #include <stdio.h> |
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2 | #include <ctype.h> |
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3 | struct mf_ret { |
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4 | int freq; |
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5 | char ch; |
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6 | }; |
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7 | |
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8 | struct mf_ret most_frequent(const char * str) { |
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9 | char freqs [26] = { 0 }; |
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10 | struct mf_ret ret = { 0, 'a' }; |
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11 | for (int i = 0; str[i] != '\0'; ++i) { |
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12 | if (isalpha(str[i])) { // only count letters |
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13 | int ch = tolower(str[i]); // convert to lower case |
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14 | int idx = ch-'a'; |
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15 | if (++freqs[idx] > ret.freq) { // update on new max |
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16 | ret.freq = freqs[idx]; |
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17 | ret.ch = ch; |
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18 | } |
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19 | } |
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20 | } |
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21 | return ret; |
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22 | } |
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23 | |
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24 | void dothing(const char * str) { |
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25 | struct mf_ret ret = most_frequent(str); |
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26 | printf("%s -- %d %c\n", str, ret.freq, ret.ch); |
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27 | } |
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28 | |
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29 | int main() { |
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30 | dothing("hello"); |
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31 | dothing("hello, world!"); |
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32 | dothing("aaabbbba"); |
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33 | dothing(""); |
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34 | } |
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