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How can I display 2 calculated varibles from an object of a class using a member function?

Shishykish (140)
Hello,

I have developed a coin flip simulator using classes and member functions. I have been able to use rand() to seed and determine heads and tails. From the head_count and tail_count variables I am trying to compute the % occurence of each. But I am not able to display values. I cannot see where I am going wrong.

Could you identify an error?

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#include <iostream>
#include <stdlib.h>
#include <ctime>
#include <iomanip>

using namespace std;

class coin
{
    private:
        int head_count;
        int tail_count;


    public:
        coin(int = 0, int = 0, int = 0);
        int max_toss;
        void coin_toss(int);
        void percentage_algorithm();
        void Show_coin();
        void set_number_of_tosses();

};

//class implementations section

coin::coin(int Head_Count, int Tail_Count, int Max_Toss)
{
    head_count = Head_Count;
    tail_count = Tail_Count;
    max_toss = Max_Toss;
}

void coin::set_number_of_tosses()
{
    int n;

    cout << "Set the number of tosses" << endl;
    cin >> n;

    max_toss = n;
}

void coin::coin_toss(int max_toss)
{
    srand(time(NULL));
    for (int toss_counter = 0; toss_counter < max_toss; toss_counter++)
    {
        if ( (rand() % 2) >= 0.5)
        {
            head_count++;
        }
    }

    tail_count = max_toss - head_count;
}

void coin::percentage_algorithm()
{

    double percentage_heads;
    double percentage_tails;

    if ( max_toss == 0)
    {
        cout << "No tosses were made " << endl;

    }else{

    percentage_heads = ((head_count / max_toss) * 100.0);
    percentage_tails = ((tail_count / max_toss) * 100.0);
    cout << "The percentage of heads was " << setprecision(10)<< percentage_heads << endl;
    cout << "The percentage of tails is " << setprecision(10) << percentage_tails<< endl;

    }



    return;
}

void coin::Show_coin()
{
    cout << "The number of heads is" << head_count << endl;
    cout << "The number of tails is " << tail_count << endl;
    cout << " The number of tosses was " << max_toss << endl;
    cout << " The total number of tosses was " << max_toss << endl;
}

int main()
{
    coin a;

    a.set_number_of_tosses();

    a.coin_toss(a.max_toss);
    a.Show_coin();
    a.percentage_algorithm();

    return 0;
}
Thomas1965 (4571)
It's the problem with integer division on lines 72-73. If you change the lines to
1
2
 
percentage_heads = double(head_count) / max_toss * 100.0;
percentage_tails = double(tail_count) / max_toss * 100.0;
you get the following output:
Set the number of tosses
20
The number of heads is11
The number of tails is 9
The number of tosses was 20
The total number of tosses was 20
The percentage of heads was 55
The percentage of tails is 45
Shishykish (140)
Hello,

Thanks Thomas! I can see that by doing a double / integer wouldn't help here.
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