Merge pull request #3 from kingrishabdugar/kingrishabdugar-patch-3

Create Count frequencies in unordered Map.cpp

Count frequencies in unordered Map.cpp

@@ -0,0 +1,24 @@
+#include<bits/stdc++.h>
+using namespace std;
+void count_freq(int arr[],int n)
+{
+    unordered_map <int,int> m;
+    for(int i=0;i<n;i++)
+        m[arr[i]]++;
+    for(auto x: m)
+    cout<<x.first<<" "<<x.second<<endl;
+    cout<<"In original Order"<<" "<<endl;
+    for(int i=0;i<n;i++)
+    {
+        if(m[arr[i]]!=-1)
+            cout<<arr[i]<<" "<<m[arr[i]]<<endl;
+        m[arr[i]]=-1;
+    }
+}
+int main()
+{
+    int arr[] = { 10, 20, 20, 10, 10, 20, 5, 20 };
+    int n = sizeof(arr) / sizeof(arr[0]);
+    count_freq(arr, n);
+    return 0;
+}