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); Thanks

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