Count frequency of each element in array

Write a program to count the frequency of each element in array , as example if we have 
int a[10]={5, 10, 2, 5, 50, 5, 10, 1, 2, 2};
the output should be 
number     frequency
5          3
10         2
2          3
50         1
1          1

	#include <iostream>
	#include <cstdlib>
	using namespace std;
	int main(int argc, char** argv) {
	int a[10]={5, 10, 2, 5, 50, 5, 10, 1, 2, 2};
	int flag[10]={0};
	//count frequency of each number
	int counter=1;
	for(int i=0;i<=9;i++)
	{
	for(int j=i+1;j<=9;j++)
	{
	if (a[i]==a[j]){counter++;flag[j]=1;}
	}
	if(flag[i]!=1){cout<<a[i]<<"\t"<<counter<<endl;}
	counter=1;
	}
	return 0;
	}

view raw freq.cpp hosted with ❤ by GitHub