Add DEBUG and NUM_SHOWN to src/sorting/main.c.

diff --git a/src/sorting/main.c b/src/sorting/main.c
index 7eb791d25d54f49aca985ca651d0a11e28a5dbfe..824e8c2fc013464b5e9197ae275909bafd1b2a9c 100644 (file)
--- a/src/sorting/main.c
+++ b/src/sorting/main.c
@@ -8,15 +8,25 @@
 
 #include "sort.h"
 
+
+#define NUM_SHOWN 3
+//#define DEBUG
+
+
 void printlist(FILE * stream, int list_size, double *list, int num_shown)
 {
        int i;
-       for (i = 0; i < num_shown; i++)
-               fprintf(stream, "%f\t", list[i]);
-       fprintf(stream, "\n");
-       for (i = num_shown; i > 0; i--)
-               fprintf(stream, "%f\t", list[list_size - i]);
-       fprintf(stream, "\n");
+       if (num_shown > 0) {
+               for (i = 0; i < num_shown; i++)
+                       fprintf(stream, "%g\t", list[i]);
+               fprintf(stream, "...\n...\t");
+               for (i = num_shown; i > 0; i--)
+                       fprintf(stream, "%g\t", list[list_size - i]);
+               fprintf(stream, "\n");
+       } else {
+               for (i = 0; i < list_size; i++)
+                       fprintf(stream, "%g\n", list[i]);
+       }
 }
 
 double checklist(int list_size, double *list)
@@ -52,7 +62,9 @@ int read_data(const char *file_name, int *pList_size, double **pList)
                return EXIT_FAILURE;
        }
        // read in the data
+#ifdef DEBUG
        fprintf(stderr, "reading %d points\n", *pList_size);
+#endif /* DEBUG */
        for (i = 0; i < *pList_size; i++) {
                fscanf(fp, "%lf", &x);
                (*pList)[i] = x;
@@ -77,22 +89,26 @@ int main(int argc, char *argv[])
        if (read_data(file_name, &list_size, &list) != EXIT_SUCCESS)
                return EXIT_FAILURE;
 
+#ifdef DEBUG
        /* print initial list */
        fprintf(stderr, "The list before sorting is:\n");
-       printlist(stderr, list_size, list, 3);
-       fprintf(stderr, "Check: sum of %d elements = %f\n",
+       printlist(stderr, list_size, list, NUM_SHOWN);
+       fprintf(stderr, "Check: sum of %d elements = %g\n",
                list_size, checklist(list_size, list));
+#endif /* DEBUG */
 
        /* sort the list */
        sort(list_size, list);
 
+#ifdef DEBUG
        /* print final list */
        fprintf(stderr, "The list after sorting is:\n");
-       printlist(stderr, list_size, list, 3);
+       printlist(stderr, list_size, list, NUM_SHOWN);
        fprintf(stderr, "Check: sum of %d elements = %g\n",
                list_size, checklist(list_size, list));
-       for (i = 0; i < list_size; i++)
-               printf("%g\n", list[i]);
+#endif /* DEBUG */
+
+       printlist(stdout, list_size, list, 0);
 
        return EXIT_SUCCESS;
 }