Last post of the year 2012

Hi to all the blog viewer's.

There were few posts this year, I am not sure weather they are interesting or not but I hope u like them...:)
Posts this year were not that frequent, I can promise this 2013 will have more frequent posts with interactive and interesting stuff.....;)

2012 posts were mostly TECHNICAL, which is not good right! ;) So this year will be a pack of music, treck's, sharing and then at last technical...

So goodbye to 2012..I here by welcome 2013 ...hiphip hurray
:)

Simplest logic for Time Display on LCD using 8051

/* here time starts from 0 seconds, you can add logic to set the time

not clear den try to make it clear or comment here */


#include reg51.h #include "lcd_display4bit.h" //for header check this void printTime(); long timerCount=; short int count=0; sbit getTime=P1^2; void CountSeconds() interrupt 1 {

String Sorting Program in C (uses array of pointers to store strings)

/* string sorting program the logic may be simple but I have used array of pointers here to store the strings
crucial here is u should you malloc and calloc to get 
correct output(because array of pointers are used)*/ #include stdio.h #include string.h #define MAX 50 void main() { char *names[MAX],*dummy; int i=0,j=0,n=0; clrscr(); puts("enter no. of strings you want to enter"); scanf("%d",&n); printf("please enter %d strings\n\n",n);

Scramble word finder- C program

/* C program for SCRAMBLE word finding
Download a wordlist.txt file on internet which consists of
all possible english words and save it in your program folder
before running the program. */


#include stdio.h #include string.h void main() { FILE *fp; char scramble[12],word[18],dummy[18],c; int i=0,j=0,wordLen,wordLenS,count=0; clrscr(); fp=fopen("wordlist.txt","r"); printf("enter scrambled word--"); scanf("%s",scramble); wordLenS=strlen(scramble);

Pattern Finder in all DIRECTIONS in a GRID of numbers -C program

/* Pattern Finder in all DIRECTIONS in a GRID of numbers -C program
you are allowed to enter a pattern of any length then the ROW and
COL of the pattern occurence is shown in the output.
pattern is searched in ALL THE EIGHT DIRECTIONS */


#include stdio.h #include string.h short int checkPattern(int,int,int); short cp[8][8]={5,4,1,2,3,4,5,6, 6,3,1,2,3,4,5,5, 5,7,5,3,5,1,3,1, 4,1,7,4,3,4,5,1, 3,2,3,4,5,1,5,2, 2,2,5,2,1,4,1,3, 1,4,7,8,6,5,4,4, 6,5,3,2,6,7,8,5}; char p[5]; void main() { int i,j,k;

Password STRENGTH and VALIDITY checking C program

/* password Strength and Validity checking C program-

This program takes your password and checks weather its valid
are not.
If valid then its checks the password strength and gives
one of the following result : LOW, MEDIUM, HIGH, VERY HIGH.


note-this is my algorithm(most followed), you can change as you need.
*/


#include stdio.h #include conio.h #include string.h #define SIZE 32 short int checkValid(char*); void checkStrength(char*); short int alphabetCount=0, digitCount=0; short int length=0; short int symbolCount=0; //to count symbols like ;'./ etc void main() { char pw[SIZE],c; short int count,error,i=0; clrscr();

PASSWORD entry model- C program

// program for how **** are displayed when you type anything

// in the PASSWORD box

#include stdio.h #include conio.h int main() { int i=0; char ch,pass[10]; clrscr(); puts("enter password (max 10 characters wide) \n"); puts("only digits and characters are allowed "); puts("\n enter here- "); while((ch=getch())!='\r') //until ENTER is pressed { if(isalnum(ch)) { putchar('*'); pass[i++]=ch; } } pass[i]='\0'; printf("\n entered password is- %s",pass); getch(); return 0; }

RFID based Attendance system using 8051- with easy AUTOMATIC FILE generation facility

watch the video for explanation of the project

#include
 #include<string.h>
 #include "lcd_display4bit.h"

 #define TOTAL 5

 void serial_init();
 void serial_txS(char *);
 void serial_tx(char);
 void checkID();
 void printOnTerminal();
 short int checkTodaysAttd(int);

 sbit ON=P1^0;
 sbit RESET=P1^1;
 sbit result=P1^2;
 sbit IR_Tx=P1^3;
 sbit IR_Rx=P1^4;
 sbit Reset_Todays_Attendence=P1^5;
 
struct details
 {
   char *name;
   char id[4];
   int count;
 }emp[TOTAL]={{"phanindra", "437p", 0},
          {"nayak",     "455n", 0},
          {"anilKumar", "414a", 0},
          {"gowtham",   "456g", 0},
          {"chaitu",    "449c", 0}};

 char recieved_id[4]={0};
 int i, no_of_stu=0, todays_count=0;
 int todays_ids[4]={0};
 short int access=0, gotID=0;

 void serial() interrupt 4
 {
   EA=0;
     for(i=0;i<4;i++)
      {
        while(RI==0);
        recieved_id[i]=SBUF;
        RI=0;
      }
      gotID=1;
   EA=1;
 }

//***********************************------
 void main()
  {
    ON=RESET=result=1;
    rs=en=0;
    P2=0x00;
    IR_Rx=1;
    IR_Tx=0;
    EA=1;
    ES=1;
    serial_init();
    lcd_init();

super:    
   while(1)
     {
     IR_Tx=0;
     lcd_cmd(0x01);

       while(!ON)
       { 
        lcd_cmd(0x01);
        IR_Tx=1;
         while(!(IR_Rx==1))
         {
          lcd_cmd(0x01);
          lcd_dataS("ID please");
          
          while(gotID==0)   //wait until any card is shown
            if(ON==1) goto super;
          
          checkID();    
         }
       }
      /////////////////////////
       while(!result)
        {
          for(i=0;i<=TOTAL;i++)
          {
            lcd_cmd(0x01);
            lcd_dataS(emp[i].name);
            lcd_cmd(0xc0);
            lcd_data_int(emp[i].count);
            delay_msec(500);
          }
        }
      ////////////////////////

       while(! Reset_Todays_Attendence)
        {
          for(i=0;i'\0';

          todays_count=0;
          lcd_cmd(0x01);
          lcd_dataS("todays attd rst");
          delay_msec(100);
        }
      ///////////////////////
      }    //end of super loop
 } //end of main

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

void checkID()
{
  access=0;               //like a flag
  lcd_dataS(recieved_id);
    for(i=0;iif(( strcmp(emp[i].id , recieved_id) )==0)
     { 
      if(checkTodaysAttd(i)) 
          {
              access=1;
              lcd_cmd(0x01);
              lcd_dataS("welcome");
              lcd_cmd(0xc0);
              lcd_dataS(emp[i].name);
              emp[i].count++;

            todays_ids[todays_count]=i+1;
                 todays_count++;

            delay_msec(400);
              printOnTerminal();
            gotID=0;
              break;
          }
       else
         {
           lcd_cmd(0x01);
           lcd_dataS("your turns over");
           gotID=0;
           delay_msec(400);
         }
     }
    }


   if(access==0)
    {
        lcd_cmd(0x01);
        lcd_dataS("access denied");
        delay_msec(100);
        gotID=0;
    }    
}

short int checkTodaysAttd(int id)
{
  short int d;
  for(d=0;dif(id==(todays_ids[d]-1))
    return 0;    //return 0 if specific ID has already been
  }               //counted for today.
  return 1;
}

void printOnTerminal()
{ EA=0;
  serial_tx('\r');
  serial_tx('\n');
  serial_txS(emp[i].name);
  serial_tx(' ');
  serial_txS(emp[i].id);
  serial_tx(' ');
  serial_tx(emp[i].count+48);
  EA=1;
}  

void serial_init()
{
  TMOD=0x20;
  TH1=0xfd;
  SCON=0x50;
  TR1=1;
}

void serial_txS(char *p)
{
  while((*p)!='\0')
  {
    SBUF=*p;
    while(TI==0);
    TI=0;
    p++;
  }
}

void serial_tx(char x)
{
  SBUF=x;
  while(TI==0);
  TI=0;
} 

Searching WORD and its COUNT in a FILE - C program

string Searching in a FILE- C program

count of the appearances 
/* program for searching a keyword in a FILE.
   program also tells the number of matches */


 #include "stdio.h"  
 #include "string.h"
 #include "ctype.h"

 void main()
 {
   FILE *fp;
   char keyword[15]={0},c;
   int i,length,count=0;
   clrscr();

Time Display On LCD using 8051 Microcontroller

/* Displaying time on LCD using microcontroller
    To get 1sec delay timer(16bit mode) should overflow 14 times, 
 but instead i have used only 11 times because I 
 have counted prograam instructions delays and 11 
 times will increment exactly 1sec.   

 algorithm: wait in the loop for INCREMENT to be 1
      INCREMENT will be 1 only when the timer0
      overflows for 11 times(spcifically for my program)
      see my program logic, you can understand  */


#include<reg51.h>
#include "lcd_display4bit.h"

sbit ON=P1^0;
sbit SET=P1^1;
sbit incr_hrs=P1^2;
sbit incr_min=P1^3;
sbit set_hrs=P1^5;
sbit set_min=P1^4;

int sec,min,hrs;
int min_value=0,hrs_value=0,sec_value=0;
int count=0,increment=0;

void timer0() interrupt 1
{

  EA=0;
   TH0=0x00;
   TL0=0x00;
   count++;       //everytime timer overflows count is incremented
   if(count==11)  //if count is 11 then make increment=1
    {             //why 11 because if timer overflows for 11 times  
     count=0;     //then it will be 1sec
     increment=1;
    }
 else 
  increment=0;
  TF0=0;
  EA=1;
}

LCD in 4bit MODE -8051

/* LCD 4bit MODE-  D7-D4 of LCD are connected to P2.7-P2.4

   ALGORITHM- first higher byte is sent and then the lower byte
          
     step1: mask the Lower nibble and send them to LCD 
               (temp= value & 0xf0);
          send(temp);
     step2: enable pulse
     step3: left shift the value for 4 times, which makes lower nibble
            moves to higher nibble and higher nibble moves to lower nibble
          temp= value<<4;
       temp=value & 0xf0;
       send(temp);
     step4: enable pulse      */


#include<reg51.h>

void delay_msec(int);
void lcd_init();
void lcd_data(char);
void send(char);
void lcd_cmd(char);
void lcd_dataS(char *p);
void lcd_data_int(int);

sbit rs=P2^0;
sbit en=P2^1;

//***********************************------
void main()
{
  P2=0x00;
  rs=en=0;
  lcd_init();
  lcd_dataS("hello pc");
  lcd_cmd(0xc0);
  lcd_data_int(555);
  while(1)
  {
  }
}

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

Calculator Project with just keypad and LCD 8051

/* calculator Project for 8051---
   Possible Operation- add, sub, mul, div
   limitations- decimal part is truncated
                result upto only 6decimals */
/* algorithm::
     step1:store the entered values in an array
         if any operator key is pressed goto step2
  step2:store the var1 here (using convertArrayToDecimal() function)
        and also store the operator pressed
         if '=' operator is pressed goto step3
  step3:do the respective operation and display the result */

#include<reg51.h>
#include"lcd_display.h"

int pow(int, int);
void convertArrayToDecimal(int*);
void clear_array();
void column1();
void column2();
void column3();
void column4();
char getkey();

sbit c1=P2^0;
sbit c2=P2^1;
sbit c3=P2^2;
sbit c4=P2^3;
sbit r1=P2^4;
sbit r2=P2^5;
sbit r3=P2^6;
sbit r4=P2^7;


int var1=0,var2=0,dummy_var,row,col;

char values[4][4]={{55,56,57,'/'},
                   {52,53,54,'*'},
          {49,50,51,'-'},
          {' ',48,'=','+'}};

int num[5]; // to store the entered keys
int i=0;
void main()
{
char key;
unsigned char operation;
int var_count=0;
int result;

Security Door project Program for 8051

#include<reg51.h>
#include"lcd_display.h"

void column1();
void column2();
void column3();
void resetPassword();
void getNewPassword();
char getkey();

sbit c1=P0^0;
sbit c2=P0^1;
sbit c3=P0^2;
sbit r1=P0^3;
sbit r2=P0^4;
sbit r3=P0^5;
sbit r4=P0^6;
sbit reset_password=P1^2;
sbit ON=P1^3;

char reset_code[3]={'9','9','9'},password[6];

int i=0,count=0,danger=0;
int col,row;
char num[4][3]={{'1','2','3'},
                {'4','5','6'},
       {'7','8','9'},
       {'*','0','#'}};

void main()
{
  char c;
  c1=c2=c2=1;
  r1=r2=r3=r4=0;
  reset_password=ON=1;
  rs=en=0;
  P2=0x00;
  TMOD=0x01;
  lcd_init();
 

Keypad Interfacing with 8051 Program

#include<reg51.h>

void lcd_cmd(char);
void lcd_init();
void lcd_data(char);
void delay(int);

sbit rs=P2^0;
sbit oe=P2^1;

void column1();
void column2();
void column3();
char getkey();

sbit c1=P1^0;
sbit c2=P1^1;
sbit c3=P2^2;
sbit r1=P2^3;
sbit r2=P2^4;
sbit r3=P2^5;
sbit r4=P2^6;

int x,y;
char num[4][3]={{'1','2','3'},
                {'4','5','6'},
       {'7','8','9'},
       {'*','0','#'}};
void main()
{
char c;

Token System Program for 8051

#include<reg51.h>

void lcd_cmd(char);
void lcd_init();
void lcd_data(char[]);
void delay(int);
void lcd_dataint(int);

void counter1();  //to print the count value at counter1 location
void counter2();                                     //(on lcd)
void counter3();

sbit rs=P2^4;
sbit oe=P2^0;
sbit but1=P2^1;   //counter1 button 
sbit but2=P2^2;   //counter2 button
sbit but3=P2^3;   //counter3 button

int token_no=0;   //overall count 

void main()
{
   rs=0;
   oe=0;
   but1=1;but2=1;but3=1;
   TMOD=0x01;
   lcd_init();
   lcd_data("C1    C2    C3  ");

Simple ELEVATOR program for 8051

#include<reg51.h>
#include"lcd_display.h"

sbit ON = P1^0;
sbit floor1 = P1^1;
sbit floor2 = P1^2;
sbit floor3 = P1^3;
sbit dooropen = P1^4;

sbit motorF = P2^0;
sbit motorR = P2^1;
sbit motor_en = P2^3;
sbit led_doorOpen = P2^2;
sbit ON_led = P2^4;

void delay_sec(int);

short int PresentLevel = 0, RequestLevel;


void main()
{
motorF = motorR = led_doorOpen = motor_en = ON_led = rs = en = 0;
ON = floor1 = floor2 = floor3 = dooropen = 1;



TMOD = 0x01;
P3=0x00;
lcd_init();
motor_en=0;

Wired ROBO car Program for 8051

/* wired robo car program for 8051 microcontroller

 design description:;: contains two motors one on left(ml) and one on right(mr)::contains headlights and backlights::moreover this is wired robo car (not wireless) */

#include<reg51.h>

sbit mr_p = P2^0;      //motor_right_positive
sbit mr_n = P2^1;      //motor_right_negetive
sbit ml_p = P2^2;      //motor_left_positive 
sbit ml_n = P2^3;      //motor_left_negetive
sbit leds_front = P2^4;
sbit en_mr = P2^6;     //motor_right_enable
sbit en_ml = P2^7;     //motor_left_enable
sbit led_backL = P3^0;
sbit led_backR = P3^1;

sbit head_lights = P1^6;    //inputs
sbit key = P1^5;
sbit fw = P1^0;
sbit re = P1^1;
sbit left = P1^2;
sbit right = P1^3;
sbit stop = P1^4;

void main()
{
  int i;  

  fw = re = left = right = stop = head_lights = key = 1;
  mr_p = mr_n = ml_p = ml_n = leds_front = en_mr = en_ml = 0;
  led_backL = led_backR = 0;
  

Electronic Voting Machine

#include<reg51.h>


void nominee(char[],int);

void lcd_cmd(char);
void lcd_init();
void lcd_data(char[]);
void delay(int);
void lcd_dataint(int);
void results();

sbit start=P1^0;
sbit n1=P1^1;
sbit n2=P1^2;
sbit n3=P1^3;
sbit rs=P2^0;
sbit oe=P2^1;
sbit again=P1^4;
sbit result=P1^5;

int nom[3]={0,0,0};
int overallC=0,permission=0;

     
  void main()
   {
     n1=n2=n3=start=1;
     oe=rs=0;
     P3=0x00;
     TMOD=0x01;

understanding getch(), getche() and getchar() in C

/* program to understand the getch(), getche() and getchar() differences */

//note that these three functions are for getting character from the cosole only but they differ the way they take

#include<stdio.h>
#include<conio.h>
void main()
{
char ch[2],op;
int i=0;
clrscr();
while((i++)<=2)      //just i am rotating this for 3 times
{
printf("\na.getch() \nb. getche() \nc.getchar()\n\t");
puts("enter your option");
ch=getche();

switch(op)
{
case 'a': puts("\nenter char");
ch[0]=getch();      //here character entered is stored but not displayed on console
break;                                             
case 'b':puts("\nenter char");      
ch[1]=getche();   //here char entered is taken(no need to press enter) and displayed on console
break;                                          
case 'c': puts("\nenter char");
ch[2]=getchar();           //here character entered is displayed on console and
break;                           //entered char is stored only after pressing 'enter key'

}
}
printf("\nstored values are %s",ch);
getch();
}

C program for Decoding an Encoded file

/*program to decode an encoded file and storing decoded data into an another file */

#include<stdio.h>
void main()
{
int d,i;
char c;
FILE *fp1,*fp2;
clrscr();
fp1=fopen("resume_e.txt","r");           //open same encoded file in previous post
fp2=fopen("dec_resume.txt","w");

while((c=fgetc(fp1))!=EOF)      
{
d=c;
d=d-30;                     //here you should use the same value ie., in the previous
c=d;                            //post I used d=d+30 so here i should use d=d-30;
fputc(c,fp2);
puts("processing...");              
}
clrscr();
fclose(fp1);
fclose(fp2);
puts("decoding is over");
getch();
}

 

Encoding an Text file using C program

/* program to encode an text file */

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

void main()
{
int d,i;
char c;
FILE *fp1,*fp2;
fp1=fopen("resume.txt","r");         //here i used my resume file, you can use any file but it
fp2=fopen("resume_e.txt","w");  // should be in the BIN folder

while((c=fgetc(fp1))!=EOF)      //main logic
{
d=c;
d=d+30;
c=d;
fputc(c,fp2);
puts("processing...");                 //check by keeping this line before the loop
}
clrscr();
fclose(fp1);
fclose(fp2);
printf("text is encoded and stored in file");
getch();
}

Encoding text using C and storing in FILE

/* program for encoding the text and storing the original and encoded data in files */

#include<stdio.h>
#include<string.h>
void main()
{
char c, data[100], enc[100],enc_bin[8];
int d,i,j;
FILE *fp1,*fp2;
clrscr();
fp1=fopen("original.txt","w");
fp2=fopen("encoded.txt","w");
printf("enter text and press enter --\n\n\t");
i=0;
j=0;

while((c=getchar())!='\n')    //main logic
{
data[i++]=c;
fputc(c,fp1);             //storing the original data in file
d=c;                                //converting char to int (ascii value)
d=d+26;                      // changing its ASCII value by adding 26
c=d;                               // converting back it to char type
fputc(c,fp2);          //putting the encoded text into anotherfile
enc[j++]=c;
}

printf("encoded data is--\n\n\t ");
for(i=0;i<j;i++)
printf("%c",enc[i]);

fclose(fp1);
fclose(fp2);

getch();
}

Encoding text (basic encoding)

/* program for encoding entered text to any symbol (within the ASCII range)*/

#include<stdio.h>
#include<string.h>
void main()
{
char src[100]={0},enc[100]={0},c;
int i=0,d,len;
clrscr();
printf("enter text which you want to encode--");

while((c=getchar())!='\n')        //storing the entered text
 src[i++]=c; 

i=0;                                                                                                        len=strlen(src);

while(i<len)                  //main logic
{
d=src[i];
d=d+13;                      //instead of 13 you can take any value,
c=d;                              // but sum should be <255 because ASCii
enc[i]=c;                  //maximum value is 255
i++;
}

printf("encoded data is :\n\n\t %s",enc);

getch();
}

Converting text to Binary

#include<stdio.h>
#include<string.h>
void main()
{
int d,i=0,j=0,bin[8]={0};
char list[20],c;
clrscr();
printf("enter text press enter at last-");

while((c=getchar())!='\n')        //storing text into array using getchar()
list[i++]=c;

i=0;

while(i<strlen(list))                    //logic starts here
{
d=list[i];                                              // storing character in an dummy var.
j=0;
while(d>=1)                                      // binary conversion logic starts from here
{
if(d==1)
{
bin[j]=1;
break;
}
bin[j]=d%2;
d=d/2;
j++;
}                         

for(j=7;j>=0;j--)                          //this loop is for printing the binary form
printf("%d",bin[j]);
printf("\n");
i++;
}

getch();
}

Conversion of TEXT to BINARY

#include<stdio.h>
#include<string.h>
void main()
{
int d,i=0,j=0,bin[8]={0};
char list[20],c;
clrscr();
printf("enter text press enter at last-");
while((c=getchar())!='n')
list[i++]=c;

i=0;

while(i<strlen(list))
{
d=list[i];
j=0;
while(d>=1)
{
if(d==1)
{
bin[j]=1;
break;
}
bin[j]=d%2;
d=d/2;
j++;
}

for(j=7;j>=0;j--)
printf("%d",bin[j]);
printf("n");
i++;
}

getch();
}

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ASCII values printing on CONSOLE

/*program for printing ASCII values*/

#include

void main()
{
int x;
char p;
clrscr();
printf("ASCII values\n");
x=1;
while(x<=255)
{
printf("%d--%c\t",x,x);
x++;
}
getch();
}

ASCII values printing on CONSOLE

/*program for printing ASCII values*/

#include

void main()
{
int x;
char p;
clrscr();
printf("ASCII values\n");
x=1;
while(x<=255)
{
printf("%d--%c\t",x,x);
x++;
}
getch();
}

DECIMAL to BINARY conversion (for a range of decimal values)

/* C program for DECIMAL TO BINARY CONVERSION for a range of values */


#include
void main()
{
int num,i=0,start,end,j;
int bin[10]={0};
clrscr();
printf(" decimal to binary converting\n\n\n");
printf("enter START and END of range: "); //suppose if range is 1to50, then you
scanf("%d%d", &start,&end); //should enter START=1 and END=50
printf("\n\n\t the binary form is :\n\n");
for(num=start;num<=end;num++)
{
i=0;
j=num;
while(j>=1)
{
if(j==1)
{
bin[i]=1;
break;
}
bin[i]=j%2;
j=j/2;
i++;
}
printf("%4d -- ",num);
for(i=9;i>=0;i--)printf("%d",bin[i]);
printf("\n");
}
getch();
}

DECIMAL to BINARY conversion (for a range of decimal values)

/* C program for DECIMAL TO BINARY CONVERSION for a range of values */


#include
void main()
{
int num,i=0,start,end,j;
int bin[10]={0};
clrscr();
printf(" decimal to binary converting\n\n\n");
printf("enter START and END of range: "); //suppose if range is 1to50, then you
scanf("%d%d", &start,&end); //should enter START=1 and END=50
printf("\n\n\t the binary form is :\n\n");
for(num=start;num<=end;num++)
{
i=0;
j=num;
while(j>=1)
{
if(j==1)
{
bin[i]=1;
break;
}
bin[i]=j%2;
j=j/2;
i++;
}
printf("%4d -- ",num);
for(i=9;i>=0;i--)printf("%d",bin[i]);
printf("\n");
}
getch();
}

C program for DECIMAL to BINARY conversion

/* program for DECIMAL to BINARY converter */

#include
void main()
{
int num,i=0,bin,next;
clrscr();
printf(" decimal to binary converting\n\n\n");
printf("enter any decimal no. ");
scanf("%d", &num);
printf("please note that the binary form is represented in the\n form
(LSB ...MSB)\n");
printf("\n\n\t The binary form is :");


while(num>=2)
{
bin=num%2;
num=num/2;
printf("%d",bin); //logic can easily implemented using ARRAYs
if(num==1) //but i am not using arrays here.
printf("1"); //this is the MSB
}

getch();
}

C program for DECIMAL to BINARY conversion

/* program for DECIMAL to BINARY converter */

#include
void main()
{
int num,i=0,bin,next;
clrscr();
printf(" decimal to binary converting\n\n\n");
printf("enter any decimal no. ");
scanf("%d", &num);
printf("please note that the binary form is represented in the\n form
(LSB ...MSB)\n");
printf("\n\n\t The binary form is :");


while(num>=2)
{
bin=num%2;
num=num/2;
printf("%d",bin); //logic can easily implemented using ARRAYs
if(num==1) //but i am not using arrays here.
printf("1"); //this is the MSB
}

getch();
}