#include <array>
#include <iostream>
#include <unordered_map>
std::unordered_map<char, int> getASCIIFrequency(const std::string& str) {
std::array<int, 128> frequencyTable = {0};
for (char c : str) {
frequencyTable[static_cast<int>(c)]++;
}
std::unordered_map<char, int> result;
for (int i = 0; i < frequencyTable.size(); i++) {
if (frequencyTable[i] > 0) {
result[static_cast<char>(i)] = frequencyTable[i];
}
}
return result;
}
int main() {
std::string str = "c++ c c++ c# java python php";
auto asciiFrequency = getASCIIFrequency(str);
for (const auto& pair : asciiFrequency) {
std::cout << pair.first << ": " << pair.second << std::endl;
}
}
/*
run:
v: 1
t: 1
o: 1
j: 1
h: 2
p: 3
c: 4
y: 1
+: 4
#: 1
n: 1
a: 2
: 6
*/
