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How to count alphabetic character occurrences in text file with C++

1 Answer

0 votes
#include <iostream>
#include <fstream>

using std::cout;
using std::endl;

int main()
{
	std::ifstream ifs("d:\\data.txt");

	int letters[26];
	char ch;
	
	for (int i = 0; i < 26; i++) letters[i] = 0;

	while (!ifs.eof()) {
		ifs >> ch;
		if (isalpha(ch) && !ifs.eof()) {
			letters[ch - 'a']++;
		}
	}

	ifs.close();

	for (int i = 0; i < 26; i++) {
		if (letters[i] != 0)
			cout << (char)('a' + i) << ": " << letters[i] << endl;
	}

	return 0;
}

/*
run:

a: 2
c: 3
h: 2
j: 1
n: 1
o: 1
p: 3
t: 1
v: 1
y: 1

*/

 




answered Jun 13 by avibootz
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