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C++ project to row reduce matrices

I am writing a c++ project to row reduce matrices. I was wondering if the following line would work to find the absolute value of the largest number in a row?

e=fabs(a[b][b]);

Thanks

Re: C++ project to row reduce matrices

The function calculates the absolute value of a specific value, i.e. it strips off the sign, so fabs(-3) is 3. To find the highest value in a row you need to loop over that row storing the current highest and replace it when you come across a higher value.

As I've already answered this in another thread here's some code (not compiled):

Code:

int arr[10];

init_arr(arr); // you have to write this; it sets up the 10 values.

int highest=arr[0]; // set highest to the first value

for (int i=1; i<10; i++)

{

  if (arr[i]>highest)

    highest = arr[i];

}

// now highest contains the highest individual value