#include <cstdio>
#include <cstdlib>
#include <ctime>

using namespace std;

int chances(int value)
{
    int count = 0;
    for(int i = 0; i < 1000; ++i)
    {
        if (rand()%100 < value) ++count;
    }
    return count;
}

int main(int argc, const char * argv[])
{
    srand(time(0));
    for(int value = 0; value < 100; value += 10)
    {
        int count = chances(value);
        printf("%3d :  %3d.%01d\n",value, count/10,count%10);
    }
}