add basic implementation

main.cpp

-vector<int> sort_custom( vector<int> );
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+#include"sorting.h"
+#include<iostream>
+
+
+using namespace std;
+
+int main(){
+	int n;
+	vector<int> vin;
+	vector<int> vout;
+	cin >> n;
+	for (int i = 1; i <= n; i++){
+		int temp;
+		cin >>temp;
+		vin.push_back(temp);
+	}
+	vout=sort_custom(vin);
+	for (auto i = vout.begin(); i != vout.end(); ++i) 
+	        cout << *i << " ";
+}
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sorting.cpp

+#include<vector>
+
+using namespace std;
+
+vector<int> sort_custom(vector<int> v){
+   int i, j;
+   int n=v.size();
+   for (i = 0; i < n-1; i++){      
+        for (j = 0; j < n-i-1; j++){ 
+           if (v[j] > v[j+1]){
+			   int temp;
+			   temp=v[j];
+			   v[j]=v[j+1];
+			   v[j+1]=temp;
+           }
+	   }
+   }
+   return v;
+}
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sorting.h

+#include<vector>
+using namespace std;
 vector<int> sort_custom( vector<int> );
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