[SOLVED] VLA array style

atlantis43 · 11-11-2013, 02:29 PM

I'm a newbie to C programming, and wonder if anyone can tell me if the following code I've written for a text problem is correct in style, or can it be improved to look "professional".
Problem is:"Make 3 sets of 5 doubles stored as array.
Compute average of each row using VLA."
Particular question regards my style of passing in additional argument to function prototype so that row#
can be passed to function.

Code:

#include <stdio.h>
#define ROWS 3
#define COLS 5

void avg_row(int ,double ar[*],int );   //fn prototype
int main(void)
{
int i= ROWS,j=COLS;
double arr[i][j];

    for(i=0;i<ROWS;i++)                 //initialize array
        {
        for(j=0;j<COLS;j++)
            {
            puts("Enter a double value");
            while(scanf("%lf", &arr[i][j])!=1 && getchar()!='\n')
                {
                printf("Retry: Enter a double value!\n");
                }
            }
        }
   for(i=0;i<ROWS;i++)                  //1-D array function calls
    {
     avg_row(COLS,arr[i],i);
    }
return 0;
}
}

void avg_row(int n,double ar[n],int m)  //fn definition
{
double linetotal=0.0;

        for(int i=0;i < n; i++)         //sum array rows
            {
            linetotal += ar[i];
            }
            printf("Average for row %d is %.2f\n",m+1,linetotal/n);
}

Thanks for any help