freq letter in a string

t11e09.freqString.cpp

// t11e09.freqString.cpp
// juanfc 2023-11-22
// 

#include <iostream>
#include <array>
using namespace std;

typedef array<int,256> TCharFreq;

TCharFreq getFreqs(string s);
void printFreqs(TCharFreq f);

int main()
{
    printFreqs(getFreqs("telephone"));
    return 0;
}

TCharFreq getFreqs(string s)
{
    TCharFreq r;
    for (int i = 0; i < 256; ++i)
        r[i] = 0;

    for (int i = 0; i < s.length(); ++i)
        ++r[s[i]];
    return r;
}
void printFreqs(TCharFreq f)
{
    for (int i = 0; i < 256; ++i)
        if (f[i] > 0)
            cout << char(i) << ": " << f[i] << endl;
}