C Program to generate Graph using grphics.h

C Program to Generate the graph sheet using the grphics.h library. To use graphics.h, we have to install the drivers in to the the system by using the initgraph() function. Here  we derive the graph of input sizes verses time taken for input sizes. x axis represents inputs(0,10000,20000,—-), y axis rep time(0,0.05,0.1,0.15—). Read more about C Programming Language.

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

#include "stdio.h"
#include "conio.h"
#include "graphics.h"
void main() {
int gd = DETECT, gm;
int y = 0, x = 10, m[20], k[20], n, a[20], i;
float b[20];
initgraph(&gd, &gm, "c:\tc\bgi");
printf("nntGenerating the Graphsnn");
printf("nEnter the no. of inputst");
scanf("%d", &n);
printf("nEnter the input sizes and corresponding time takenn");
for (i = 0; i < n; i++) {
printf("nEnter input sizet");
scanf("%d", &a[i]);
printf("nEnter time takent");
scanf("%f", &b[i]);
}
cleardevice();
//represents y axis
line(10, 0, 10, 400);
//represents x axis
line(10, 400, 600, 400);
while (y <= 400) {
line(0, y, 10, y);
y = y + 20;
}
while (x <= 600) {
line(x, 400, x, 410);
x = x + 20;
}
outtextxy(20, 440, "1unit=20 pixels , origin is (10,400)");
outtextxy(
20,
450,
"x axis represents inputs(0,10000,20000,----), yaxis rep time(0,0.05,0.1,0.15---)");
setcolor(5);
for (i = 0; i < n; i++) {
k[i] = (a[i] * 0.002);
m[i] = (400 - (b[i] * 400));
putpixel(k[i], m[i], 11);
}
for (i = 0; i < n - 1; i++)
line(k[i], m[i], k[i + 1], m[i + 1]);
getch();
}
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C Program to calculate factorial using Recursive function

C Program to find the factorial of a number. In this program we used the Recursion method. Recursion is the programming technique that a process invoking itself again and again. The standard recursive function for factorial is factorial=n*fact(n-1). factorial of number denoted by ‘!’, means product of all non negative integers from 1 to number. example: 5!=5*4*3*2*1=120. Read more about C Programming Language .

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*
* Happy Coding
***********************************************************/

#include<stdio.h>
int factorial(int);

void main()
{
int num;
printf("Enter the number to calculate Factorial :");
scanf("%d",&num);
printf("nFactorial : %d", factorial (num));

}
int factorial (int i)
{
int f;
if(i==1)
return 1;
else
f = i* factorial (i-1);
return f;
}
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C Program to demonstrate the ‘fgets’ function.

Program to demonstrate the ‘fgets’ function. The program will count the number of lines in a file. This is a function of the UNIX command ‘wc’. 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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* To find more C programs, do visit www.c-program-example.com
* and browse!
*
* Happy Coding
***********************************************************/



#include <stdio.h>

#define LINE_LENGTH 80

main()
{
FILE* fp;
char line[LINE_LENGTH];
int count=0;

fp=fopen("/home/DOC/C/c.html","r");
/* Count up the lines here. */
while ( fgets(line, LINE_LENGTH, fp) != NULL) count++;

printf("File contains %d lines.n", count);

fclose(fp);
}
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C Program to calculate the Combinations and Permutations.

C Program to calculate the Combination and Permutations. Combination means way of selecting a things or particular item from the group or sets. nCr=n!/r!(n-r)!. Permutations means possible way of rearranging in the group or set in the particular order. Read more about C Programming Language .

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* for personal and learning purposes. For permissions to use the
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* and browse!
*
* Happy Coding
***********************************************************/

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

main()
{
int n , r, ncr( int , int);
long npr( int , int);
long double fact( int);
printf(" Enter value of n & r n");
scanf("%d %d",&n , &r);
if( n>= r)
{
printf( " %dC%d is %dn", n,r,ncr( n , r));
printf(" %dP%d is %ld", n,r,npr( n, r));
}
else
{
printf("WRONG INPUT?? enter the correct input");
}
}
long double fact( int p)
{
long double facts = 1;
int i;
for( i = 1; i<= p; i++)
facts = facts * i;
return( facts);
}

int ncr ( int n, int r)
{
return( fact( n) / (fact( r) * fact(n- r) ) ) ;
}

long npr( int n , int r)
{
return( fact( n) / fact( n- r));
}
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C Program to check the given number is Armstrong or not?

C Program to check the given number is Armstrong number or not?. Armstrong number is a number that is the sum of its own digits each raised to the power of the number of digits. Example: 153 = 1^3 + 5^3 + 3^3. Read more about C Programming Language .

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


#include<stdio.h>
void main()
{
int num,num1,arms=0,rem;

printf("Enter the number:n");
scanf("%d",&num);
num1=num;
while(num>0)
{
rem=num%10;
arms=arms+rem*rem*rem;
num=num/10;
}
if(num1==arms)
{
printf(" n%d is an Armstrong number",num1);
}
else
{
printf("n%d is NOT an Armstrong number",num1);
}

}
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C Program to Demonstrate #if, #else & #endif preprocessors.

C Program to demonstrate the Preprocessor directives like #if, #else, #define, #endif. C Preprocessors are not the program statements, they are executed before the actual compilation of the code. C Preprocessors substitute the code where they called, i.e they replace the code as they defined. #if, #else are the conditional directives. Here at the compile time #if value is false, so #else part is execute.
Read more about C Programming Language .

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* contact info@c-program-example.com
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* and browse!
*
* Happy Coding
***********************************************************/

#include<stdio.h>

#define SWITCH 0

/* The #if can only perform
* INTEGER tests!!!!
*/
#if ( SWITCH == 1 )
#define TEXT "Example to #if"
#else
#define TEXT "Example to # else"
#endif

main ()
{
printf(TEXT);
}
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C Program to check the given number is perfect or not.

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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* for personal and learning purposes. For permissions to use the
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*
* 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 sort a linked list.

Data structures using C, Linked list is a data structure in which the objects are arranged in a linear order. In this program, we sort the list elements in ascending order. 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 info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
*
* Happy Coding
***********************************************************/




#include <stdio.h>
#include <stdlib.h>
#define NULL 0

struct linked_list
{
int number;
struct linked_list *next;
};
typedef struct linked_list node;

main ()
{
int n;
node *head = NULL;
void print(node *p);
node *insert_Sort(node *p, int n);

printf("Input the list of numbers.n");
printf("At end, type -999.n");
scanf("%d",&n);

while(n != -999)
{
if(head == NULL) /* create 'base' node */
{
head = (node *)malloc(sizeof(node));
head ->number = n;
head->next = NULL;

}

else /* insert next item */
{
head = insert_Sort(head,n);
}
scanf("%d", &n);
}
printf("n");
print(head);
print("n");
}
node *insert_Sort(node *list, int x)
{
node *p1, *p2, *p;
p1 = NULL;
p2 = list; /* p2 points to first node */

for( ; p2->number < x ; p2 = p2->next)
{
p1 = p2;

if(p2->next == NULL)
{
p2 = p2->next; /* p2 set to NULL */
break; /* insert new node at end */
}
}

/* key node found */
p = (node *)malloc(sizeof(node)); /* space for new node */
p->number = x; /* place value in the new node */
p->next = p2; /* link new node to key node */
if (p1 == NULL)
list = p; /* new node becomes the first node */
else
p1->next = p; /* new node inserted after 1st node */
return (list);
}
void print(node *list)
{
if (list == NULL)
printf("NULL");
else
{
printf("%d-->",list->number);
print(list->next);
}
return;
}
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