Create CoinChangeProblem.cpp

CoinChangeProblem.cpp

@@ -0,0 +1,46 @@
+// Recursive C++ program for
+// coin change problem.
+#include <bits/stdc++.h>
+using namespace std;
+
+// Returns the count of ways we can
+// sum coins[0...n-1] coins to get sum "sum"
+int count(int coins[], int n, int sum)
+{
+
+	// If sum is 0 then there is 1 solution
+	// (do not include any coin)
+	if (sum == 0)
+		return 1;
+
+	// If sum is less than 0 then no
+	// solution exists
+	if (sum < 0)
+		return 0;
+
+	// If there are no coins and sum
+	// is greater than 0, then no
+	// solution exist
+	if (n <= 0)
+		return 0;
+
+	// count is sum of solutions (i)
+	// including coins[n-1] (ii) excluding coins[n-1]
+	return count(coins, n - 1, sum)
+		+ count(coins, n, sum - coins[n - 1]);
+}
+
+// Driver code
+int main()
+{
+	int i, j;
+	int coins[] = { 1, 2, 3 };
+	int n = sizeof(coins) / sizeof(coins[0]);
+	int sum = 4;
+
+	cout << " " << count(coins, n, sum);
+
+	return 0;
+}
+
+// This code is contributed by shivanisinghss2110