Array target sum pair hint

#1

what is wrong in the below code ??

#include
using namespace std;

// Returns number of pairs in arr[0…n-1]
// with sum equal to ‘sum’
int printPairs(int arr[], int n, int target)
{
int count = 0; // Initialize result

// Consider all possible pairs and check 
// their sums 
for (int i = 0; i < n; i++) 
    for (int j = i + 1; j < n; j++) 
        if (arr[i] + arr[j] == target) 
            cout << "(" << arr[i] << ", "
                 << arr[j] << ")" << endl;

}

// Driver function to test the above function
int main()
{

int n;
cin>>n;
int arr[n];
int target;
cin>>target;
for(int i=0;i<n;i++){
	arr[i];
}
printPairs(arr, n, target); 
return 0;

}

#2

you are not taking the i/p in the correct order

target has to be taken after the array elements are inputed.

Output format also need to match the required format
if (arr[i] + arr[j] == target)
cout << arr[i] << " and "
<< arr[j] << endl;
Also try optimising the code

#3

Sort the array before applying the operation

#4

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