Binary search

void main()
{
int a[10],i,n,m,c,l,u;
clrscr();
printf("Enter the size of an array->");
scanf("%d",&n);
printf("\nEnter the elements of the array->");
for(i=0;i");
for(i=0;i");
scanf("%d",&m);
l=0,u=n-1;
c=binary(a,n,m,l,u);
if(c==0)
printf("\nThe number is not in the list");
else
printf("\nThe number is found");
getch();
}
int binary(int a[],int n,int m,int l,int u)
{
int mid,c=0;
if(l<=u)
{
mid=(l+u)/2;
if(m==a[mid])
{
c=1;
}
else
if(m
{
return binary(a,n,m,l,mid-1);
}
else
return binary(a,n,m,mid+1,u);
}
else
return

Linear search

void main()
{
int a[10],i,n,m,c=0;
clrscr();
printf("Enter the size of an array->");
scanf("%d",&n);
printf("\nEnter the elements of the array->");
for(i=0;i");
for(i=0;i");
scanf("%d",&m);
for(i=0;i
{
if(a[i]==m)
{
c=1;
break;
}
}
if(c==0)
printf("\nThe number is not in the list");
else
printf("\nThe number is found");
getch();
}

Airtel music using C

#include
#include
float main(void)
{
float A,Bb,D,G,F;
A = 440;
G = 780;
Bb = 461;
D = 586;
F = 687;
sound(G);
delay(500);
nosound();
sound(G);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(G);
delay(500);
nosound();
sound(2*D);
delay(500);
nosound();
sound(2*A);
delay(250);
nosound();
sound(2*Bb);
delay(250);
nosound();
sound(2*A);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(F);
delay(500);
nosound();
sound(2*A);
delay(500);
nosound();
sound(G);
delay(250);
nosound();
sound(2*A);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(F);
delay(250);
sound(G);
delay(250);
sound(2*A);
delay(250);
sound(2*Bb);
delay(500);
sound(2*A);
delay(500);
sound(G);
delay(250);
sound(F);
delay(250);
sound(D);
delay(500);
nosound();
//end 1
sound(G);
delay(500);
nosound();
sound(G);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(G);
delay(500);
nosound();
sound(2*D);
delay(500);
nosound();
sound(2*A);
delay(250);
nosound();
sound(2*Bb);
delay(250);
nosound();
sound(2*A);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(F);
delay(500);
nosound();
sound(2*A);
delay(500);
nosound();
sound(G);
delay(250);
nosound();
sound(2*A);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(F);
delay(250);
sound(G);
delay(250);
sound(2*A);
delay(250);
sound(2*Bb);
delay(500);
sound(2*A);
delay(500);
sound(G);
delay(250);
sound(F);
delay(250);
sound(D);
delay(500);
nosound();
//end 2
sound(2*A);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(F);
delay(250);
sound(G);
delay(250);
sound(2*A);
delay(250);
sound(2*Bb);
delay(500);
sound(2*A);
delay(500);
sound(G);
delay(250);
sound(F);
delay(250);
sound(D);
delay(500);
nosound();
//end 3
sound(2*A);
delay(250);
nosound();
sound(G);
delay(250);
nosound();
sound(F);
delay(250);
sound(G);
delay(250);
sound(2*A);
delay(250);
sound(2*Bb);
delay(500);
sound(2*A);
delay(500);
sound(G);
delay(250);
sound(F);
delay(250);
sound(D);
delay(500);
nosound();
return 0;
}

Copy Data from 1file 2 another

#include"stdio.h"
void main()
{
FILE *p,*q;
char file1[20],file2[20];
char ch;
clrscr();
printf("\nEnter the source file name to be copied:");
gets(file1);
p=fopen(file1,"r");
if(p==NULL)
{
printf("cannot open %s",file1);
exit(0);
}
printf("\nEnter the destination file name:");
gets(file2);
q=fopen(file2,"w");
if(q==NULL)
{
printf("cannot open %s",file2);
exit(0);
}
while((ch=getc(p))!=EOF)
putc(ch,q);
printf("\nCOMPLETED");
fclose(p);
fclose(q);
getch();
}

Stack program

/* Program of stack using array*/
#include
#define MAX 5

int top = -1;
int stack_arr[MAX];

main()
{
int choice;
while(1)
{
printf("1.Push\n");
printf("2.Pop\n");
printf("3.Display\n");
printf("4.Quit\n");
printf("Enter your choice : ");
scanf("%d",&choice);
switch(choice)
{
case 1 :
push();
break;
case 2:
pop();
break;
case 3:
display();
break;
case 4:
exit(1);
default:
printf("Wrong choice\n");
}/*End of switch*/
}/*End of while*/
}/*End of main()*/

push()
{
int pushed_item;
if(top == (MAX-1))
printf("Stack Overflow\n");
else
{
printf("Enter the item to be pushed in stack : ");
scanf("%d",&pushed_item);
top=top+1;
stack_arr[top] = pushed_item;
}
}/*End of push()*/

pop()
{
if(top == -1)
printf("Stack Underflow\n");
else
{
printf("Popped element is : %d\n",stack_arr[top]);
top=top-1;
}
}/*End of pop()*/

display()
{
int i;
if(top == -1)
printf("Stack is empty\n");
else
{
printf("Stack elements :\n");
for(i = top; i >=0; i--)
printf("%d\n", stack_arr[i] );
}
}/*End of display()*/

Writing entire array to file

#include"stdio.h"
void main()
{
FILE *p;
int i,a[10];
if((p=fopen("myfile.dat","wb"))==NULL)
{
printf("\nUnable to open file myfile.dat");
exit(1);
}
printf("\nEnter ten values, one value on each line\n");
for(i=0;i<10;i++)
scanf("%d",&a[i]);
fwrite(a,sizeof(a),1,p);
fclose(p);
getch();
}

Writing string to a file

#include"stdio.h"
void main()
{
FILE *p;
char str[70];
if((p=fopen("string.txt","w"))==NULL)
{
printf("\nUnable to open file string.txt");
exit(1);
}
else
printf("\nEnter a set of strings,Press just enter key to finish\n: ");
while(strlen(gets(str))>0)
{
fputs(str,p);
fputs("\n",p);
}
fclose(p);
getch();
}