Question

Im trying to create a function in C where it takes an array and size and returns the largest absolute value in the array (either negative or positive) using only stdio.h. Any help would be greatly appreciated!

Ex: if the array is { -2.5, -10.1, 5.2, 7.0}, it should return -10.1

Ex: if the array is {5.1, 2.3, 4.9, 1.0}, it should return 5.1.

double getMaxAbsolute(double array[], int size)
{
    double max = array[0];
   double abs[size];
   for (int i = 0; i < size; i++) {
      
        if ( array[i] >= 0){
        abs[i] = array[i];
        }
        else if (abs[i] < 0){
           abs[i] = - array[i];
       }

       if (abs[i] > max)
       {
            max = array[i];
          
        }
   }

   return max;
}

Answer 1

#include <stdio.h>

double getMaxAbsolute(double array[], int size)
{
double maximum = array[0];
double actual_value = maximum;
if(maximum < 0)
maximum = maximum*-1;

int i;
for(i=1; i<size; i++)
{
if(array[i] < 0 && array[i]*-1 > maximum)
{
actual_value = array[i];
maximum = array[i]*-1;
}
else if(array[i] >= 0 && array[i] > maximum)
{
actual_value = array[i];
maximum = array[i];
}
}
return actual_value;
}

int main(void) {
double a[] = { -2.5, -10.1, 5.2, 7.0};
printf("%lf\n", getMaxAbsolute(a, 4));

double b[] = {5.1, 2.3, 4.9, 1.0};
printf("%lf\n", getMaxAbsolute(b, 4));
return 0;
}

/*OUTPUT

-10.100000
5.100000

*/

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