diff --git a/Datastructures/Stack Using Array.cpp b/Datastructures/Stack Using Array.cpp
index 944258ed4..c5ad146cb 100644
--- a/Datastructures/Stack Using Array.cpp	
+++ b/Datastructures/Stack Using Array.cpp	
@@ -1,12 +1,12 @@
 #include<iostream>
 using namespace std;
 
-int stack[10];
-int top=0;
+int *stack;
+int top=0, size;
 
 void push(int x)
 {
-	if(top==10)
+	if(top==size)
 	{
 		cout<<"\nOverflow";
 	}
@@ -42,6 +42,9 @@ void topmost()
 }
 int main()
 {
+	cout<<"\nEnter Size of stack : ";
+	cin>>size;
+	stack = new int[size];
 	int ch, x;
 	do
 	{
diff --git a/Decimal To Hexadecimal .cpp b/Decimal To Hexadecimal .cpp
index fadddfd74..39333ca00 100644
--- a/Decimal To Hexadecimal .cpp	
+++ b/Decimal To Hexadecimal .cpp	
@@ -2,50 +2,25 @@
 
 using namespace std;
 
-void main(void)
-{
+int main(void){
 	int valueToConvert = 0; //Holds user input
 	int hexArray[8];       //Contains hex values backwards
 	int i = 0;             //counter
-	int lValue = 0;       //Last Value of Hex result
+	char HexValues[] = "0123456789ABCDEF";
 
 	cout << "Enter a Decimal Value" << endl; //Displays request to stdout
 	cin >> valueToConvert;					        //Stores value into valueToConvert via user input
 
-	while (valueToConvert > 0)        //Dec to Hex Algorithm
-	{
-		lValue = valueToConvert % 16;        //Gets remainder
-		valueToConvert = valueToConvert / 16;
-		hexArray[i] = lValue;             //Stores converted values into an array
-		i++;
+	while (valueToConvert > 15){        //Dec to Hex Algorithm
+		hexArray[i++] = valueToConvert % 16;        //Gets remainder
+		valueToConvert /= 16;
 	}
+	hexArray[i] = valueToConvert;        //Gets last value
+	
 	cout << "Hex Value: ";
-	while (i > 0)
-	{
-		//Displays Hex Letters to stdout
-		switch (hexArray[i - 1]) {
-			case 10:
-				cout << "A"; 
-				break;
-			case 11:
-				cout << "B";
-				break;
-			case 12:
-				cout << "C";
-				break;
-			case 13:
-				cout << "D";
-				break;
-			case 14: 
-				cout << "E";
-				break;
-			case 15:
-				cout << "F";
-				break;
-			default:
-				cout << hexArray[i - 1]; //if not an int 10 - 15, displays int value
-		}
-			i--;
-	}
+	while (i >= 0)
+		cout<<HexValues[hexArray[i--]];
+	
 	cout << endl;
+	return 0;
 }