c-resources/CPlusPlus20ForProgrammers-m.../examples/ch06/fig06_08.cpp

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// fig06_08.cpp
// Poll analysis program.
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//#include <format> // C++20: This will be #include <format>
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#include <iostream>
#include <array>
int main() {
// place survey responses in array responses
constexpr std::array responses{
1, 2, 5, 4, 3, 5, 2, 1, 3, 1, 4, 3, 3, 3, 2, 3, 3, 2, 2, 5};
// initialize frequency counters to 0
constexpr size_t frequencySize{6}; // size of array frequency
std::array<int, frequencySize> frequency{};
// for each response in responses, use that value
// as frequency index to determine element to increment
for (const int& response : responses) {
++frequency[response];//.at(response);
}
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std::cout << "Rating Frequency \n";
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// output each array element's value
for (size_t rating{1}; rating < frequency.size(); ++rating) {
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std::cout << rating << " " << frequency.at(rating) << "\n";
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}
}
/**************************************************************************
* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
* Pearson Education, Inc. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
**************************************************************************/