It is declared in declaration section.

Like variable we have to declare the function before its use.

eg.   void  fun(int,int);

     This is the the main advantages of linked over array.

           Linked list is a compeletely different way to represent a list is to make each item in list of a structure and it also contains a “link” .

          Using linked list we can work many task that we can’t do using array like delete or add a element in a list.

      SO for this purpose “LINKED LIST”  is introduced in C.

23

345

456

5678

6789

————————————————————————————————————————————————————————————–

#include<stdio.h>

#include<conio.h>

void main()

{

int i=3,j,k=5,n,cnt=0;

clrscr();

printf(“enter any number : “);

scanf(“%d”,&n);

printf(“%3d”,1);

printf(“\n%3d%3d\n”,2,3);

for(i=3;i<=n;i++)

{

for(j=i;j<=k+cnt;j++)

printf(“%3d”,j);

cnt++;

if(cnt%2==0)

{

k+=3;

cnt=0;

}

printf(“\n”);

}

getch();

}

• fwrite();
• fread();

#include<stdio.h>

#include<conio.h>

void main()

{

FILE *fp;

char c;

int cnt=0;

clrscr();

         fp=fopen(“prog.c”,”r”);

while((c=getc(fp))!=EOF)

{

      if(c==’/')

       cnt++;

       if(c=getc(fp)==’/’)

cnt++;

if(cnt==2)

while((c=getc(fp))!=’\n’);

else

printf(“%c”,c);

fclose(fp);

getch();

}