Merge pull request #723 from bitroot9761/master

added recursive product of 2 number in cpp

Author: probot-auto-merge[bot]

C++/recursion/productOfTwoNo.cpp

@@ -0,0 +1,28 @@
+#include <iostream> 
+using namespace std; 
+int multrecur(int n, int m) 
+{ 
+    if (n > 0 && m < 0) { 
+        return multrecur(m, n); 
+    } 
+    else if (n < 0 && m < 0) { 
+        return multrecur((-1 * n), (-1 * m)); 
+    } 
+    if (n > m) { 
+        return multrecur(m, n); 
+    } 
+    else if (m != 0) { 
+        return n + multrecur(n, m - 1); 
+    } 
+    else { 
+        return 0; 
+    } 
+} 
+int main() 
+{ 
+    cout << "10 * 5 = " << multrecur(10, 5) << endl; 
+    cout << "10 * (-5) = " << multrecur(10, -5) << endl; 
+    cout << "(-10) * 5 = " << multrecur(-10, 5) << endl; 
+    cout << "(-10) * (-5) = " << multrecur(-10, -5) << endl; 
+    return 0; 
+}