convert c code to java code

Code:

---

/* File: 
 *    ex3.11a_serial_prefix_sums.c
 *
 * Purpose: 
 *    Compute the prefix sums of an input vector
 *
 * Compile:
 *    gcc -g -Wall -o ex3.11a_serial_prefix_sums ex3.11a_serial_prefix_sums.c
 * Run:
 *    ./ex3.11a_serial_prefix_sums <order of vector>
 *
 * Input:
 *    A vector
 * Output:
 *    The prefix sums of the vector
 *
 * IPP:  Exercise 3.11a
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void Read_vector(char prompt[], double vect[], int n);
void Print_vector(char title[], double vect[], int n);
void Compute_prefix_sums(double vect[], double prefix_sums[], int n);

int main(int argc, char* argv[]) {
  double *vect, *prefix_sums;
  int n;

  if (argc != 2) {
      fprintf(stderr, "usage:  %s <order of vector>\n", argv[0]);
      exit(0);
  }
  n = strtol(argv[1], NULL, 10);
  vect = malloc(n*sizeof(double));
  prefix_sums = malloc(n*sizeof(double));

  Read_vector("Enter the vector", vect, n);
  Print_vector("Input vector", vect, n);
  Compute_prefix_sums(vect, prefix_sums, n);
  Print_vector("Prefix sums", prefix_sums, n);

  free(vect);
  free(prefix_sums);
  return 0;
}  /* main */

/*-------------------------------------------------------------------*/
void Read_vector(char prompt[], double vect[], int n) {
  int i;

  printf("%s\n", prompt);
  for (i = 0; i < n; i++)
      scanf("%lf", &vect[i]);
}  /* Read_vector */

/*-------------------------------------------------------------------*/
void Print_vector(char title[], double vect[], int n) {
  int i;

  printf("%s\n  ", title);
  for (i = 0; i < n; i++)
      printf("%.2f ", vect[i]);
  printf("\n");
}  /* Print_vector */

/*-------------------------------------------------------------------*/
void Compute_prefix_sums(double vect[], double prefix_sums[], int n) {
  int i;

  prefix_sums[0] = vect[0];
  for (i = 1; i < n; i++)
      prefix_sums[i] = prefix_sums[i-1] + vect[i];
}  /* Compute_prefix_sums */

---

Is there a point to this post?

Quote:

---

Originally Posted by GCDEF

Is there a point to this post?

---

I think he wants someone to convert the c code to Java? but why a poll??

Quote:

---

Originally Posted by 2kaud

but why a poll??

---

Maybe it's to find out how many didn't want to convert the code until finally someone did. :)

Anyway what I do know is the importance of the "prefix sums" the code calculates.

When you come across an O(N*N) algorithm consisting of two nested loops in a time bottleneck you will want to replace the innermost loop with a table look-up turning the algorithm into O(N). Then quite often actually the table you are looking for is the one holding the prefix sums.

Quote:

---

Originally Posted by wolle

Maybe it's to find out how many didn't want to convert the code until finally someone did. :)

---

Probably...
But why then any option is only "no"? :confused::confused::confused:

Quote:

---

Originally Posted by VictorN

Probably...
But why then any option is only "no"? :confused::confused::confused:

---

No is not the only option, you have four identical no's to choose between :). There must be some weird kind of quantum computing going on.

:confused::D:confused::D:confused::D:confused::D