organizing array from least to greatest c++ - c++

Question

Hi I'm working on a project that lets the user input numbers and the code organizes them in order of least to greatest and tells how many of each number was input. I'm having problems with the organizing of least to greatest and counting how many of each number are inputed
using namespace std;
#include <iostream>
void main(){
double a[30];
double e[30];
double b;
int c[30];
int d;
double f=0;
cout << "how many input values [max 30]:";
cin >> d;
cout << "enter " << d << " numbers:"<<endl;
for(int x=0; x<d;x++){
cin >> a[x];
c[x]=0;
}
cout << endl;
for(int y=0; y<d;y++){
if(a[y]>=f){
f=a[y];
}
}
for(int z=0;z<d;z++){
if(a[z]){
c[z]++;
}
if(a[z]>=a[z+1]){
e[z]=a[z];
}
}
cout << "numbers count"<< endl;
for(int printloop=0;printloop<d;printloop++){
if(a[printloop]>0){
cout << e[printloop]<< " " << c[printloop] << endl;
}
}
cout << "max value:" << b << endl;
}

Answer 1

Solution base on std::map http://en.cppreference.com/w/cpp/container/map, note the Compare template argument and C++11 (http://en.cppreference.com/w/cpp/language/range-for)
#include <iostream>
#include <map>
int main(int argc, char** argv)
{
std::map<int, int> count;
int n;
std::cout << "How many numbers ? ";
std::cin >> n;
std::cout << "Now enter " << n << " numbers : ";
for(auto i=0; i<n; i++)
{
int tmp;
std::cin >> tmp;
count[tmp]++;
}
for(auto const& elem : count )
std::cout << "Element " << elem.first << " count : " << elem.second << "\n";
return 0;
}