Write an algorithm to find a pair of 2 elements to sum defined (user input) Eg Input array [1,2,3,6,8,1,6] and Sum = 5 so Expected output = [2,3] Explanation: only 2 and 3 forms a pair to sum = 5 in the given array.The answer should be generic for any array and sum input

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By Aashish Kumar in Algorithms in C# on Jan 06 2018

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Mar, 2018 16
Console.WriteLine("Enter array values with seperation : "); string abc = Console.ReadLine();int[] arr = new int[abc.Split(':').Length];string[] strArray = abc.Split(':');for (int i=0; i < strArray.Length;i++ ){arr[i] = Convert.ToInt32(strArray[i].ToString());}Console.WriteLine("Enter sum of number : "); int sumofinput = Convert.ToInt32(Console.ReadLine()); for (int i = 0; i < arr.Length; i++) { for (int j = 0; j < arr.Length; j++) { if (Convert.ToInt32(arr[i]) + Convert.ToInt32(arr[j]) == sumofinput)Console.WriteLine("Sum of " + sumofinput + " pair is :" + arr[i] + "," + arr[j]);} } Console.Read();
- 2

May, 2018 12

 public static int[] ArraySum(int[] arr,int sum)
 {
 int len = arr.Length;
 int[] sumArr = null;
 for (int i = 0; i <; len; i++)
 {
 for (int j = 0; j <; len; j++)
 {
 if (i != j)
 {
 if (arr[i] + arr[j] == sum)
 {
                            sumArr = new int[2];
                            sumArr[0] = arr[i];
                            sumArr[1] = arr[j];
 break;
 }
 }
 }
 if (sumArr != null) break; 
 }
 return sumArr;
 }

Feb, 2018 14
Console.WriteLine("Enter max of array : ");int[] arr = new int[Convert.ToInt32(Console.ReadLine())];for (int i = 0; i < arr.Length; i++){arr[i] = Convert.ToInt32(Console.ReadLine());}Console.WriteLine("Enter sum of number : ");int sumofinput = Convert.ToInt32(Console.ReadLine());for (int i = 0; i < arr.Length; i++){for (int j = 0; j < arr.Length; j++){if (Convert.ToInt32(arr[i]) + Convert.ToInt32(arr[j]) == sumofinput)Console.WriteLine("Sum of " + sumofinput + " pair is :" + arr[i] + "," + arr[j]);}}Console.Read();
- 1

Jun, 2020 8

 static bool findPairFromArray(int[] v,int suma,int n) {
 for (int i = 0; i < n; i++) {
 for (int j = 0; j < n && j != i; j++) {
 if (v[i] + v[j] == suma) {
 Console.WriteLine("The pair is :[{0},{1}]", v[i], v[j]);
 return true;
 }
 }
 }
 return false;
 }
 static void Main(string[] args)
 {
 int[] v ={ 1, 2, 4, 7, 8,6,3 };
 //findPairFromArray(v, 8, 7);
 if (findPairFromArray(v, 10, 7))
 {
 Console.WriteLine("I find a pair!");
 }
 Console.ReadKey();
 }
}

Aug, 2019 10

public static void addaraay()
{
int[] addnum = { 2, 1, 6, 4, 8, 3, 2, 1 };
string sum = Console.ReadLine();
int totalsum = Convert.ToInt32(sum);
int[] addnum1 = addnum;
for (int i = 0; i <= addnum.Length - 1; i++)
{
int j = i + 1;
for (; j < addnum1.Length - 1; j++)
{
 int howmuch = addnum[i] + addnum1[j];
 if (howmuch == totalsum)
 {
 Console.WriteLine("pair is " + addnum[i] +", " +addnum1[j]);
 }
 }
 }

Oct, 2018 7
int[] x = { 1, 2, 3, 6, 8, 1, 6 };for (int i = 0; i < x.Length; i++){for (int j = 0; j < x.Length; j++){if (5 == x[i] + x[j]){}}}
- 0
Sep, 2018 10
Console.WriteLine("Enter array values with seperation , ");string abc = Console.ReadLine();int[] arr = new int[abc.Split(',').Length];string[] strArray = abc.Split(',');for (int i = 0; i < strArray.Length; i++){arr[i] = Convert.ToInt32(strArray[i].ToString());}Console.WriteLine("Enter sum of number : ");int sumofinput = Convert.ToInt32(Console.ReadLine());//int[] SumnMinusOne for (int i = 0; i < arr.Length; i++){int ComplementaryNumber = sumofinput - arr[i];if (arr.Contains(ComplementaryNumber)){Console.WriteLine("Sum of " + sumofinput + " pair is :" + arr[i] + "," + ComplementaryNumber);break;}}
- 0
Jan, 2018 31
sort array set 2 pointer (p1,p2) to first and end of array loop while p1 smaller than p2 check if p1+p2 is equla to number return true check if p1+p2 is greater than number decrease p2 check if p1+p2 is equla to number increase p1
- 0

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