Click here to download commasep.c.

/*****************************************************************
 print elements of A separated by commas
 *****************************************************************/
#include <stdio.h>

int main() {
  // read size n, allocate array of n doubles, read values into array
  int n;
  scanf(" %i", &n);
  double A[n];
  for(int i = 0; i < n; ++i) {
    scanf(" %lg", &A[i]);
  }

  // print elements with commas between
  printf("A = [");
  for (int i=0; i < n-1; ++i) {
    printf("%g, ", A[i]);
  }
  printf("%g]\n", A[n-1]);

  return 0;
}