Last change
on this file since 5b643ea was
67982887,
checked in by Peter A. Buhr <pabuhr@…>, 6 years ago
|
specialize thesis directory-names
|
-
Property mode set to
100644
|
File size:
745 bytes
|
Rev | Line | |
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[9c14ae9] | 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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