C basic

C Program to check the given number is perfect or not.

Posted on by Sandeepa Nadahalli
C Program to check the given number is perfect or not?.  Perfect number is a positive integer that is equal to the sum of its proper positive divisors. example 6, divisor of 6 are 1, 2,3. Sum of divisors is 1+2+3=6.
Read more about C Programming Language .

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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 [email protected]
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* and browse!
* 
*                      Happy Coding
***********************************************************/


#include<stdio.h>
int main(){
 int num,i=1,sum=0;

 printf("Enter a number: ");
 scanf("%d",&num);

 while(i<num){
  if(num%i==0)
   sum=sum+i;
  i++;
 }
 if(sum==num)
  printf("%d is a perfect number",i);
 else
  printf("%d is not a perfect number",i);

 return 0;
}
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C Program to print Pascal’s Triangle

Posted on by Sandeepa Nadahalli

Pascal Triangle is started by 1, then followed by The binomial coefficient (n,k),
where n is the non negative integer and k is the integer between 0 and n.
Pascal triangle is the triangular array.
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"
int main() 
{
    int r, i, j, b, num;
    printf("How many lines do you want?");
    scanf("%d", &r);
    b = r;
    for(i=0;i<r;i++) 
    {
        num = 1;
        for(j=0;j<=i;j++) 
        {
            printf("%d", num);
            num = (num * (i-j)/(j+1));
        }
        printf("n");
    }
}

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C Program to print Floyd’s triangle

Posted on by Sandeepa Nadahalli
Floyd’s triangle is the right angled triangular array of natural numbers. Here we used the nested For loop to print the Floyd’s triangle.
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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 [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include<stdio.h>


int main(){
 int i,j,n,k=1;

 printf("Enter the range: ");
 scanf("%d",&n);

 printf("FLOYD'S TRIANGLEnn");
 for(i=1;i<=n;i++){
  for(j=1;j<=i;j++,k++)
   printf(" %d",k);
  printf("n");
 }

 return 0;
}
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C Program to show Sleep() function example.

Posted on by Sandeepa Nadahalli
C Program to show Sleep() function example.
sleep() function stops the execution of the program, wherever its invoked or called. It takes the arguments in microseconds. In Windows we use Sleep() function i,e ‘S’, and for other systems it is sleep() function.
/***********************************************************
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* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
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* 
*                                  Happy Coding
***********************************************************/

#include <time.h>
#include <stdio.h>
#include <windows.h> 
#include <conio.h>

int main()
{
 printf("This is the message before sleep() function");
 Sleep(1000); //1000 microsecond= 1 second will sleep...
 printf("This is the message after 1 second");
 getch();
 return 0;
}

However, I have to remind you that the program may change a bit based on
what Operating system and compiler you are using.

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C program to find the 2’s complement of a binary number.

Posted on by Sandeepa Nadahalli
C Program to calculate the 2’s complement of a binary number. 2’s complement of a number is obtained by scanning it from right to left and complementing all the bits after the first appearance of a 1. Thus 2’s complement of 11100 is 00100. 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<conio.h>

void complement (char *a);
void main()
{
 char a[16];
 int i;
 clrscr();
 printf("Enter the binary number");
 gets(a);
 for(i=0;a[i]!=''; i++)
 {
  if (a[i]!='0' && a[i]!='1')
  {
   printf("The number entered is not a binary number. Enter the correct number");
   exit(0);
  }
 }
complement(a);
getch();
}
void complement (char *a)
{
 int l, i, c=0;
 char b[16];
 l=strlen(a);
 for (i=l-1; i>=0; i--)
 {
  if (a[i]=='0')
  b[i]='1';
  else
  b[i]='0';
 }
 for(i=l-1; i>=0; i--)
 {
 if(i==l-1)
 {
  if (b[i]=='0')
  b[i]='1';
  else
  {
   b[i]='0';
   c=1;
  }
 }
 else
 {
  if(c==1 && b[i]=='0')
  {
   b[i]='1';
   c=0;
  }
 else if (c==1 && b[i]=='1')
 {
  b[i]='0';
  c=1;
 }
}
}
b[l]='';
printf("The 2's complement is %s", b);
}



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C Program to demonstrate time functions.

Posted on by Sandeepa Nadahalli
C Program to demonstrate time functions. time.h library function is used to get and manipulate date and time functions. 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>  /* NULL     */
#include <time.h>  /* ctime, asctime   */

main()
{
 time_t now;    /* define 'now'. time_t is probably 
  * a typedef */

 /* Calender time is the number of 
  * seconds since 1/1/1970  */

 now = time((time_t *)NULL);  /* Get the system time and put it 
  * into 'now' as 'calender time' */

 printf("%s", ctime(&now));  /* Format data in 'now'  
  * NOTE that 'ctime' inserts a
  * 'n' */

 /*********************************************************************/

 /* Here is another way to extract the time/date information */

 time(&now);

 printf("%s", ctime(&now));  /* Format data in 'now'  */

 /*********************************************************************/

 {
  struct tm *l_time;

  l_time = localtime(&now);  /* Convert 'calender time' to 
   * 'local time' - return a pointer 
   * to the 'tm' structure. localtime
   * reserves the storage for us. */
  printf("%s", asctime(l_time));
 }

 /*********************************************************************/

 time(&now);
 printf("%s", asctime(localtime( &now  )));

 /*********************************************************************/

 {
  struct tm *l_time;
  char string[20];

  time(&now);
  l_time = localtime(&now); 
  strftime(string, sizeof string, "%d-%b-%yn", l_time);
  printf("%s", string);
 }


}
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C Program to demonstrate macros.

Posted on by Sandeepa Nadahalli
C Program to demonstrate macros. Macro is a piece of text that is expanded by the preprocessor part of the compiler. This is used in to expand text before compiling. Macro definitions (#define), and conditional inclusion (#if). In many C implementations, it is a separate program invoked by the compiler as the first part of translation.Read more about C Programming Language .

/***********************************************************
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* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
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* 
*                                  Happy Coding
***********************************************************/

#include<stdio.h>
#define SQUARE(x) x*x

main()
{
 int value=3;

 printf("%d n", SQUARE(value));
}
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C Program to Demonstrate global and internal variables.

Posted on by Sandeepa Nadahalli
C Program to Demonstrate global and internal variables.When variable declared outside the all the blocks, they are called global variables, and they are initialized by the system. Variables declared within the functions are called as internal variables, the are locale to that function, and user only initialize the variable. 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>

int counter = 0;   /* global because we are outside
        all blocks.   */
int func(void);

main()
{
 counter++;    /* global because it has not been
        declared within this block */
 printf("counter is %2d before the call to funcn", counter); 

 func();     /* call a function.  */

 printf("counter is %2d after the call to funcn", counter); 
}

int func(void)
{
 int counter = 10;   /* local.   */
 printf("counter is %2d within funcn", counter); 
}
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C Program to demonstrate Enumeration.

Posted on by Sandeepa Nadahalli
C Program to demonstrate Enumeration. An enum(Enumeration) is a user-defined type consisting of a set of named constants called enumerators. This Program will return the month in a year. I.E. It returns 9 for September. 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>
main()
{
 /*
  * Define a list of aliases
  */
 enum months {Jan=1, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec};
 /*     A      A
          |      |
          |      |
   |      -------  list of aliases.
   --------------  Enumeration tag. */


 enum months month;  /* define 'month' variable of type 'months' */

 printf("%dn", month=Sep); /* Assign integer value via an alias     
  * This will return a 9       */
}
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C Program to demonstrate the ‘do’ statement.

Posted on by Sandeepa Nadahalli
C Program to demonstrate the ‘do’ statement. The C do while statement creates a structured loop that executes as long as a specified condition is true at the end of each pass through the loop. 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>

main()
{
 int i=1;  /* Define an integer variable.    */

 /*
  * The block is executed. Then the i <= 10 
  * expression is evaluated. If TRUE the block 
  * is executed again.
  */
 do
 {
  printf ("i is %in", i);
  i++;
 } while (i <= 10);

}
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