2011 - Page 3 of 20 - C Program Examples

Interpolation search is an algorithm used for searching a given value in an ordered indexed array. Interpolation search is sometimes called as extrapolation search. For uni formally distributed data items Interpolation search is the best method. for example: library books directory. Read more about C Programming Language.

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#include "stdio.h"
#include "stdlib.h"

#define MAX 200

int interpolation_search(int a[], int bottom, int top, int item) {

 int mid;
 while (bottom <= top) {
  mid = bottom + (top - bottom)
    * ((item - a[bottom]) / (a[top] - a[bottom]));
  if (item == a[mid])
   return mid + 1;
  if (item < a[mid])
   top = mid - 1;
  else
   bottom = mid + 1;
 }
 return -1;
}

int main() {
 int arr[MAX];
 int i, num;
 int item, pos;

 printf("nEnter total elements (num< %d) : ", MAX);
 scanf("%d", &num);

 printf("Enter %d Elements : ", num);
 for (i = 0; i < num; i++)
  scanf("%d", &arr[i]);

 printf("nELEMENTS AREn: ");
 for (i = 0; i < num; i++)
  printf("%dt", arr[i]);

 printf("nSearch For : ");
 scanf("%d", &item);
 pos = interpolation_search(&arr[0], 0, num, item);
 if (pos == -1)
  printf("nElement %d not foundn", item);
 else
  printf("nElement %d found at position %dn", item, pos);

 return 0;
}

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/***********************************************************
* You can use all the programs on www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
*
* Happy Coding
***********************************************************/

#include "stdio.h"
#define MAXINLINE 1000 /* maximum line sizes defined*/
#define LONGLINESIZE 80 /* longer line defined as 80 */
int get_lines(char line[], int maxline);
/*print lines longer than LONGLINESIZE */
main()
{
int len; /*current line length */
char line[MAXINLINE];/* current input line */
while((len=get_lines(line,MAXINLINE))>0)
if(len> LONGLINE)
printf("%s", line);
return 0;

}

/* getline: read a line into s, return length */
int get_lines(char s[], int line)
{
int c, i, j;

for(i = 0, j = 0; (c = getchar())!=EOF && c != 'n'; ++i)
{
if(i < line - 1)
{
s[j++] = c;
}
}
if(c == 'n')
{
if(i <= line - 1)
{
s[j++] = c;
}
++i;
}
s[j] = '

C Program Examples

Year: 2011

C Program To Implement Interpolation Search

K&R C Program Exercise 1-17