diff --git a/src/two-sum.cpp b/src/two-sum.cpp
new file mode 100644
index 0000000..6ef5f95
--- /dev/null
+++ b/src/two-sum.cpp
@@ -0,0 +1,23 @@
+#define ARRAY_SIZE 5
+#include <iostream>
+
+bool two_sum(
+    const int nums[ARRAY_SIZE],
+    const int target,
+    std::size_t& index0,
+    std::size_t& index1)
+{
+    for (int i = 0; i < ARRAY_SIZE-1; i++){
+	if (nums[i] >= target) continue;
+    	for (int j = i+1; j < ARRAY_SIZE; j++){
+	    if (nums[i] + nums[j] == target){
+	    	index0 = i;
+		index1 = j;
+		return true;
+	    }
+	}
+    }
+    return false;
+}
+
+