Frequency of Numbers in a 1D Array

Question

its been 6 hours since I have been writing the code but to no avail, I don\'t no where I am making the mistake but I am making some. Its a frequency output program and output sh

Answer 1

You never seem to update the counters. Try this:

int array[8] = {6,1,7,8,6,6,1,9};

unsigned int store[10] = {};    // large enough to hold the largest array value,
                                // initialized to zero

for (int n : array) ++store[n]; // update counts

for (int i = 0; i != 10; ++i)
{
    std::cout << "Frequency of int " << i << " is " << store[i] << "\n";
}

If the set of values that occur is sparse, or includes negatives, or simply does not fit into a dense range of integers nicely, you can replace unsigned int[10] with an associative container, e.g.:

std::map store;

// algorithm as before

for (auto const & p : store)
{
    std::cout << "Frequency of " << p.first << " is " << p.second << "\n";
}