Question

write a program that finds a random missing number in an unsorted list of numbers

Answer 1

// This code In C

/* GetMissingNumber Function takes array and size of array as arguments*/

int GetMissingNumber (int a[], int n)

{

    int i, total;

    total = (n+1)*(n+2)/2;   

    for ( i = 0; i< n; i++)

       total -= a[i];

    return total;

}

  

/*program to test above function */

int main()

{

// note that this code for positive inter

    int a[] = {1,2,4,5,6};

    int missNumber= GetMissingNumber(a,5);

    printf("%d", missNumber);

}

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