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TRYQSORT.C
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C/C++ Source or Header
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1988-05-24
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2KB
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46 lines
/*
TRYQSORT.C Demonstrates use of the library
routine 'qsort' to sort strings.
Ray Duncan * PC Magazine May 1988
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define ITEM_LENGTH 80 /* max string length */
#define N_ITEMS 25 /* max number of strings */
/* strings stored here */
static char items[N_ITEMS * ITEM_LENGTH];
main(int argc, char *argv[])
{
int i, j; /* some scratch variables */
while(1) /* get strings & sort them */
{
puts("\nEnter strings to be sorted...");
i = 0; /* initialize string count */
while(i < N_ITEMS) /* enforce maximum entries */
{
printf("%2d: ", i+1); /* prompt user */
/* read the keyboard */
gets(&items[ITEM_LENGTH * i]);
/* last entry if empty line */
if(items[ITEM_LENGTH * i] == 0) break;
i++; /* bump string counter */
}
if(i==0) exit(0); /* if no strings exit */
/* sort the strings */
qsort(items, i, ITEM_LENGTH, strcmp);
puts("\nHere are the sorted strings...");
j = 0; /* initialize string counter */
while (j < i) /* display sorted strings */
{
printf("%2d: %s\n", j+1, &items[ITEM_LENGTH * j]);
j++; /* bump string counter */
}
}
}