Finding the first n largest elements in an array

Question

I have got an array containing unique elements. I need to find out the first n largest elements in the array in the least complexity possible. The solution that I could thin

Answer 1

//finding the bigest number in the array//

double big = x[0];
for(t=0;tbig)
    {
        big=x[t];
    }
}
printf("\nThe bigest number is    %0.2lf  \n",big);