Check if a pair of array element is equal to sum

Array_Questions/pairsum.cpp

@@ -0,0 +1,59 @@
+/**
+ * @file pairsum.cpp
+ * @author your name ([email protected])
+ * @brief
+ * @version 0.1
+ * @date 2024-03-13
+ * Write a program in C to find a pair with given sum in the array.
+Expected Output :
+The given array : 6 8 4 -5 7 9
+The given sum : 15
+Pair of elements can make the given sum by the value of index 0 and 5
+ * @copyright Copyright (c) 2024
+ *
+ */
+#include <bits/stdc++.h>
+using namespace std;
+int main()
+{
+    int n, sum;
+    cout << "Enter size of array: ";
+    cin >> n;
+    cout << endl;
+    cout << "Enter pair sum: ";
+    cin >> sum;
+    int arr[n];
+    cout << endl;
+    for (int i = 0; i < n; i++)
+    {
+        cin >> arr[i];
+    }
+    pair<int, int> p;
+    for (int i = 0; i < n; i++)
+    {
+        p.first = i;
+        for (int j = 0; j < n; j++)
+        {
+            if (arr[i] + arr[j] == sum)
+            {
+                p.second = j;
+            }
+        }
+    }
+    cout << "Pair of elements can make the given sum by the value of index " << p.first << " and " << p.second;
+}
+/**
+ * @brief
+ * Enter size of array: 6
+
+Enter pair sum: 15
+
+6
+8
+4
+-5
+7
+9
+Pair of elements can make the given sum by the value of index5 and 0
+ *
+ */