c basics

C Program to demonstrate modf function.

Posted on by Sandeepa Nadahalli
Write a C program to demonstrate modf function.modf() defined in the C math.h library.
modf function breaks the double/float values to integral part and fractional part. 
Example: res = modf(3.142, &iptr) returns res=142 and iptr=3. Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

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* programs for commercial purposes,
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#include<stdio.h>
#include<math.h>
#include<conio.h>
int main()
{
    double num,integral,result;
    clrscr();
    printf("n Enter fractional Numbern");
    scanf("%lf",&num);
    result = modf(num, &integral);
    
    printf("%.4lf = %.4lf + %.4lfn", num, integral, result);
    
    return 0;
}
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C Program to delete vowels in a string.

Posted on by Sandeepa Nadahalli
C Strings:
Write a C Program to delete a vowel in a given string.
In this program, We use the pointers to position the characters.check_vowel() function checks the character is vowel or not, if the character is vowel it returns true else false.
Example output:Given string: Check vowel
Output is: Chck vwl
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

/***********************************************************
* 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 [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<conio.h>
#define TRUE 1
#define FALSE 0

int check_vowel(char);

main()
{
    char string[100], *temp, *pointer, ch, *start;
    csrcscr();
    printf("nnEnter a stringn");
    scanf("%s",string);
    temp = string;
    pointer = (char*)malloc(100);
    
    if( pointer == NULL )
    {
        printf("Unable to allocate memory.n");
        exit(EXIT_FAILURE);
    }
    
    start = pointer;
    
    while(*temp)
    {
        ch = *temp;
        
        if ( !check_vowel(ch) )
        {
            *pointer = ch;
            pointer++;
        }
        temp++;
    }
    *pointer = '';
    
    pointer = start;
    strcpy(string, pointer); /* If you wish to convert original string */
    free(pointer);
    
    printf("String after removing vowels is "%s"n", string);
    
    return 0;
}

int check_vowel(char a)
{
    if ( a >= 'A' && a <= 'Z' )
    a = a + 'a' - 'A';
    
    if ( a == 'a' || a == 'e' || a == 'i' || a == 'o' || a == 'u')
    return TRUE;
    
    return FALSE;
}
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C Program to demonstrate the strstr function.

Posted on by Sandeepa Nadahalli
C Program to demonstrate the strstr function.
strstr function finds the substring in a string. strstr() returns pointer of the first occurrence of the string other wise it returns the null pointer is returned.
In this program strstr returns a pointer into ‘string’ if ‘test’ is found, if not found, NULL is returned. Read more about C Programming Language .

/***********************************************************
* 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 [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/


#include <stdio.h>
#include <string.h>

main()
{
 char string[]="string to search";
 char   test[]="sear";
 if (strstr(string, test)) puts("String found");

}
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C Program To Implement Interpolation Search

Posted on by Sandeepa Nadahalli
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.

/***********************************************************
* 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 [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/


#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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