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Friday, September 14, 2012

Posted by Unknown at 9:52 PM 2 comments

Timer using Visual C++

/*************Header File****************************/

#include<afxwin.h>

class CMyWnd : public CFrameWnd        // My Window class

public:

CMyWnd();

afx_msg void OnTimer(UINT ID);

DECLARE_MESSAGE_MAP()

};

class CMyApp: public CWinApp          // Application window class

public :

BOOL InitInstance();    // initinstace function with Boolian return type

};

/***************Source File**************************/

#include "header.h"        // Include header file

#include <time.h>

CMyWnd :: CMyWnd()

Create(NULL,"MyWindow");    // Use of Constructer

afx_msg void CMyWnd::OnTimer(UINT ID)

    char s[15];

    CClientDC dc (this);

    CTime t=CTime::GetCurrentTime();

    struct tm *ntime;

    ntime=t.GetLocalTm();

    wsprintf(s,asctime(ntime));

    //AfxMessageBox(s);

    dc.TextOut(250,250,s,strlen(s)-1);

BOOL CMyApp :: InitInstance()

CMyWnd *c=new CMyWnd();

m_pMainWnd=c;

m_pMainWnd->ShowWindow(SW_SHOW);

m_pMainWnd->SetTimer(10,1000,NULL);

//MessageBox(m_pMainWnd,"hI","hOW R U",1);  //use of message box

return true;

BEGIN_MESSAGE_MAP(CMyWnd,CFrameWnd)

ON_WM_TIMER()

END_MESSAGE_MAP()

CMyApp app;

[ Read More ]

Posted by Unknown at 9:17 PM 1 comments

[C CODE] Process scheduling techniques

#include<stdio.h>

#include<stdlib.h>

#include<graphics.h>

#include<conio.h>

struct process

    int pn,at,pt,tt,wt;

}p[20],tem[20],*q[20];

int i,j,k,choice,np,c=0;

int last=-1;

int processq[50],z;

char procg[50],z1;

void qinsert(struct process *a)

    last=last+1;

    q[last]=a;

void qdelete(void)

    int l;

    processq[z]=(*q[0]).pn;

    z++;

    for(l=0;l<last;l++)

    q[l]=q[l+1];

    last--;

    if(last<-1)

    printf("error");

void result(void)

    float ttt=0,twt=0;

    printf(" \n\n");

      /*    printf("\t process\tarrival\t  burst     \twating\t  turn around\n");

    printf("\t        \ttime   \t  time      \ttime \t  time      \n\n ");

    for(i=0;i<np;i++)

        printf("\t %d) p%d\t\t%d\t  %d\t       \t%d\t  %d\n",i+1,p[i].pn,p[i].at,p[i].pt,p[i].wt,p[i].tt);

    }  */

    for(i=0;i<np;i++)

        ttt=ttt+p[i].tt;

        twt=twt+p[i].wt;

    printf("\n\n\taverage waiting   time    is : %f",twt/np);

    printf("\n\taverage turn around  time is : %f",ttt/np);

void qset(void)

    struct process temp;

    for(k=0;k<np;k++)

        tem[k]=p[k];

    for(i=0;i<np;i++)

        for(j=i;j<np;j++)

            if(tem[i].at>tem[j].at)

                temp=tem[j];

                tem[j]=tem[i];

                tem[i]=temp;

void fcfs(void)

    struct process temp;

    int c=0;

    char fcfsg[30],tempg[30];

    int gdriver = DETECT, gmode, errorcode;

   int left, top, right, bottom;

   int a=0,i,midx,midy,tq1,j;

   initgraph(&gdriver, &gmode, "d:\\tc\\bgi");

   errorcode = graphresult();

   qset();

 for(i=0;i<np;i++)

    tem[i].wt=c-tem[i].at;

    if(tem[i].wt<0)

           c=tem[i].at;

           tem[i].wt=0 ;

    tem[i].tt=tem[i].wt+tem[i].pt;

    c=c+tem[i].pt;

 for(i=0;i<np;i++)

 for(j=0;j<np;j++)

 if(p[i].pn==tem[j].pn)

      p[i]=tem[j];

 result();

 if (errorcode != grOk)  /* an error occurred */

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1);

   for(i=0;i<c;i++)

   left = getmaxx()/2 +a - 8;

   top = getmaxy() /2 - 10;

   right = getmaxx()/2 +a + 8;

   bottom = getmaxy() / 2 + 10;

  rectangle(left,top,right,bottom);

   a+=16;

   j=0;

     i=0;

   fcfsg[0]=0;

   for(i=0;i<c;i++)

    if(tem[j].at>i)

        strcat(fcfsg,"  ");

    else

    itoa(tem[j].pn, tempg, 10);

    for(tq1=tem[j].pt;tq1>0;tq1--)

    strcat(fcfsg,tempg);

    strcat(fcfsg," ");

    i=i+tem[j].pt;

    j++;

   midx = getmaxx() / 2;

   midy = getmaxy() / 2;

  outtextxy(midx, midy, fcfsg);

void rr(void)

    int s,x,tq,pt=0;

    char tempg[10];

    int gdriver = DETECT, gmode, errorcode;

   int left, top, right, bottom;

   int a=0,i,midx,midy,tq1;

   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "d:\\tc\\bgi");

   /* read result of initialization */

   errorcode = graphresult();

    printf("\n\tEnter the size of timequantom :");

    scanf("%d",&tq);

    qset();

    if(np==1)

        p[0].tt=p[0].pt;

        p[0].wt=0;

        z=1;

        processq[0]=1;

    else

    while(1)

        s=np;

        for(i=0;i<np;i++)

            if(tem[i].pt==0){s--;}

        if(s==0)

            break ;

        for(i=pt;i<np;i++)

            if(tem[i].at<=c)

              qinsert(&tem[i]);

              pt=i+1;

        if(last>=0)

            if((*q[0]).pt<=tq)

                c=c+(*q[0]).pt;

                (*q[0]).pt=0;

                (*q[0]).tt=c-(*q[0]).at;

                qdelete();

            else

                c=c+tq;

                (*q[0]).pt-=tq;

                for(i=pt;i<np;i++)

                    if(tem[i].at<=c)

                        qinsert(&tem[i]);

                        pt=i+1;

                qinsert(q[0]);

                qdelete();

        else

            c=c+tq;

            processq[z]=-99;

            z++;

    for(i=0;i<np;i++)

        for(j=0;j<np;j++)

            if(p[i].pn==tem[j].pn)

               p[i].tt=tem[j].tt;

               p[i].wt=p[i].tt-p[i].pt;

    result();

    printf("\n\nGantt chart:-\n\n");

   if (errorcode != grOk)

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1); /* terminate with an error code */

   for(i=0;i<z*tq;i++)

   left = getmaxx()/2 +a - 8;

   top = getmaxy() /2 - 10;

   right = getmaxx()/2 +a + 8;

   bottom = getmaxy() / 2 + 10;

      /* draw a rectangle */

   rectangle(left,top,right,bottom);

   a+=16;

   processq[z]='\0';

   i=0;

   while(processq[i]!='\0')

    if(processq[i]==-99)

        for(tq1=tq;tq1>0;tq1--)

            strcat(procg,"  ");

    else

    itoa(processq[i], tempg, 10);

    for(tq1=tq;tq1>0;tq1--)

    strcat(procg,tempg);

    strcat(procg," ");

    i++;

   midx = getmaxx() / 2;

   midy = getmaxy() / 2;

   /* output text at the center of the screen */

/* Note: the C.P. doesn't get changed.     */

   outtextxy(midx, midy, procg);

   /* clean up */

   /*    for(i=0;i<z;i++)

       if(processq[i]>0)

        printf("p%d ->",processq[i]);

       else

        printf("_ ->");

    } */

void main()

    int ch;

    clrscr();

    printf("\n\n\t Enter no of processes   : ");

    scanf("%d",&np);

    printf("\n Enter Data for processes : " );

    for(i=0;i<np;i++)

        printf("\n\n PROCESS (%d) :\n\n arrival time : ",i+1);

        scanf("%d",&p[i].at);

        printf("\n cpu burst time : ");

        scanf("%d",&p[i].pt);

        p[i].pn=i+1;

       //    clrscr();

    printf("\t process\tarrival time\tprocess time\n\n");

    for(i=0;i<np;i++)

        printf("\t %d) p%d     \t  %02d        \t  %02d\n",i+1,p[i].pn,p[i].at,p[i].pt);

    printf("Select a method :\n");

    printf("\n1. FCFS");

    printf("\n2. Round Robin");

    printf("\n\nEnter your choice : ");

    scanf("%d",&ch);

    if(ch==1)

    fcfs();

    else if(ch==2)

    rr();

    else

    printf("Invalid..");

    getch();

[ Read More ]

Posted by Unknown at 9:14 PM 0 comments

[C CODE] Memory management techniques

#include<stdio.h>

#include<conio.h>

#include<process.h>

#include<alloc.h>

struct process

    int size;

    int hole;

}*p;

int *h,*tmp,hn,pn,i,j,k,rem,lh,sh;

//rem=0;

void input()

    clrscr();

    printf("Enter no of holes  :  ");

    fflush(stdin);

    scanf("%d",&hn);

    h=(int *)malloc(sizeof(int)*hn);

    for(i=0;i<hn;i++)

        printf("size of hole %d  :  ",i+1);

        fflush(stdin);

        scanf("%d",&h[i]);

        tmp[i]=h[i];

    printf("Enter no of processes  :  ");

    fflush(stdin);

    scanf("%d",&pn);

    p=(struct process *)malloc(sizeof(struct process)*pn);

    for(i=0;i<pn;i++)

        printf("size of process %d  :  ",i+1);

        fflush(stdin);

        scanf("%d",&p[i].size);

        p[i].hole=0;

void ff()

    tmp=(int *)malloc(sizeof(int)*hn);

    for(i=0;i<hn;i++)

        tmp[i]=h[i];

    for(i=0;i<pn;i++)

        for(j=0;j<hn;j++)

            if(p[i].size<=tmp[j])

                tmp[j]-=p[i].size;

                p[i].hole=j+1;

                break;

    rem=0;

    lh=tmp[0];

    sh=tmp[0];

    for(i=0;i<hn;i++)

        rem+=tmp[i];

        if(tmp[i]<sh)

            sh=tmp[i];

        if(tmp[i]>lh)

            lh=tmp[i];

void nf()

    int t=0;

    tmp=(int *)malloc(sizeof(int)*hn);

    for(i=0;i<hn;i++)

        tmp[i]=h[i];

    for(i=0;i<pn;i++)

        for(j=t;j<hn;j++)

            if(p[i].size<=tmp[j])

                tmp[j]-=p[i].size;

                p[i].hole=j+1;

                t=j;

                break;

    rem=0;

    lh=tmp[0];

    sh=tmp[0];

    for(i=0;i<hn;i++)

        rem+=tmp[i];

        if(tmp[i]<sh)

            sh=tmp[i];

        if(tmp[i]>lh)

            lh=tmp[i];

void bf()

    int *diff,t1,t2,flag=0;

    diff=(int *)malloc(sizeof(int)*hn);

    tmp=(int *)malloc(sizeof(int)*hn);

    for(i=0;i<hn;i++)

        tmp[i]=h[i];

    for(i=0;i<pn;i++)

        flag=0;

        for(j=0;j<hn;j++)

            diff[j]=tmp[j]-p[i].size;

        for(j=0;j<hn;j++)

            if(diff[j]>=0)

                t1=diff[j];

                t2=j;

                flag++;

                break;

        for(j=0;j<hn;j++)

            if(diff[j]>=0 && diff[j]<t1)

                t1=diff[j];

                t2=j;

                flag++;

        if(flag)

            tmp[t2]-=p[i].size;

            p[i].hole=t2+1;

    rem=0;

    lh=tmp[0];

    sh=tmp[0];

    for(i=0;i<hn;i++)

        rem+=tmp[i];

        if(tmp[i]<sh)

            sh=tmp[i];

        if(tmp[i]>lh)

            lh=tmp[i];

void wf()

    int *diff,t1,t2,flag=0;

    diff=(int *)malloc(sizeof(int)*hn);

    tmp=(int *)malloc(sizeof(int)*hn);

    for(i=0;i<hn;i++)

        tmp[i]=h[i];

    for(i=0;i<pn;i++)

        flag=0;

        for(j=0;j<hn;j++)

            diff[j]=tmp[j]-p[i].size;

        for(j=0;j<hn;j++)

            if(diff[j]>=0)

                t1=diff[j];

                t2=j;

                flag++;

                break;

        for(j=0;j<hn;j++)

            if(diff[j]>=0 && diff[j]>t1)

                t1=diff[j];

                t2=j;

                flag++;

        if(flag)

            tmp[t2]-=p[i].size;

            p[i].hole=t2+1;

    rem=0;

    lh=tmp[0];

    sh=tmp[0];

    for(i=0;i<hn;i++)

        rem+=tmp[i];

        if(tmp[i]<sh)

            sh=tmp[i];

        if(tmp[i]>lh)

            lh=tmp[i];

void result()

       //    clrscr();

    printf("Process\tHole");

    for(i=0;i<pn;i++)

        if(p[i].hole>0)

        printf("\n%d\t%d",i+1,p[i].hole);

        else

        printf("\n%d\tcant fit",i+1);

    printf("\n\nHole status ");

    printf("\n\nHole no\tHole size\n");

    for(i=0;i<hn;i++)

        printf("\n%d\t%d",i+1,tmp[i]);

    printf("\n\nRemaining hole    -->  %d",rem);

    printf("\nSmallest hole     -->  %d",sh);

    printf("\nLargest hole      -->  %d",lh);

void main()

    int ch;

    input();

st:    printf("\ndifferent schemes ");

    printf("\n1. First fit\n2. Next fit\n3. Best fit\n4. Worst fit\n5. exit");

    printf("\n\nEnter your choice  :  ");

    fflush(stdin);

    scanf("%d",&ch);

    switch(ch)

        case 1: ff();

            break;

        case 2: nf();

            break;

        case 3: bf();

            break;

        case 4: wf();

            break;

        case 5: exit(1);

            break;

        default:printf("\ninvalid choice ..");

            printf("\npress any key to continue ....");

            getch();

            goto st;

    result();

    printf("\npress any key to continue ....");

    getch();

    goto st;

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Posted by Unknown at 9:12 PM 0 comments

[shell script]Directory operations example

 enter your choice

echo " 1. List of files & directories with permissions "

echo " 2. Create directory "

echo " 3. Remove directory "

echo " 4. Rename directory "

echo " 5. Go to directory "

echo " 6. Go out of directory "

read choice

case "$choice" in

        1)ls -l;;

        2) echo "Enter the name :"

           read name

           if [ -d $name ]

           then

           echo "directory is exist"

           else

           mkdir $name

           echo "directory '$name' has been created"

          fi;;

        3) echo " Enter The Name :"

           read name

         if [ -d $name ]

         then

         rm -r $name

        echo " the directory '$name' has been removed "

          else

          echo "the directory is not exist"

          fi;;

        4) echo "Enter Name :"

          read name

          if [ -d $name ]

          then

          echo "enter new name :"

          read nm

          mv $name $nm

          echo "direcory renamed from $name to $nm "

          else

          echo " directory $name is not exist"

          fi;;

        5) echo " enter name :"

           read name

            if [ -d $name ]

            then

            cd $name

pwd

            else

            echo "the directory is not exist "

            fi;;

         6) cd ..

pwd

;;

  esac

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Posted by Unknown at 9:06 PM 0 comments

DBMS using shell script

if [ ! -f dbms ]

then

touch dbms

fi

while [ 1 ]

do

echo " "

echo " "

echo " "

echo " The database management system operations :  "

echo " 1.For inserting data into the file "

echo " 2.View all record of file "

echo " 3.For searching the data from the file "

echo " 4.For sorting the data of file "

echo " 5.For modifying the data into the file "

echo " 6.For Delete the record "

echo " 7.For Exit "

echo " Enter your choice : "

read choice

clear

case $choice in

        1)echo " Enter the data you want to enter in the file "

          echo " Enter the roll no "

          read rno

          echo " Enter the name "

          read name

          echo " Enter the branch "

          read branch

          similar=`grep -c "$rno" dbms`

          if [ $similar -eq 1 ]

          then

          echo " The entered roll no. violates the primary key constraint on roll no "

          else

          echo " $rno|$name|$branch " | cat >> dbms

          echo " The data has been added "

fi

;;

        2)echo " The content of file is:"

          cat dbms

;;

        3)echo " Enter the word you want to search from the file "

          read word

          search=` grep -c -i "$word" dbms `

          if [ $search -eq 0 ]

          then

          echo " no such roll no. exist in the file "

          else

          grep -i "$word" dbms

fi

;;

        4)echo " Enter the technic by which you want to sort "

          echo " 1.Sort by rno. "

          echo " 2.Sort by name "

          echo " 3.Sort by branch "

          read choice

          sort -t "|" -k $choice dbms

;;

        5)echo " Enter The Roll No which wii be modified : "

          read rno

          search=` grep -c -i "$word" dbms `

          if [ $search -eq 0 ]

          then

          echo " no such roll no. exist in the file "

          else

          grep -v "$rno" dbms > temp

          mv temp dbms

          echo " Enter the roll no "

          read rno

          echo " Enter the name "

          read name

          echo " Enter the branch "

          read branch

          similar=`grep -c "$rno" dbms`

          if [ $similar -eq 1 ]

          then

          echo " The entered roll no. violates the primary key constraint on roll no "

          else

          echo " $rno|$name|$branch " | cat >> dbms

          echo " The data has been modified "

fi

fi

;;

        6)echo " Enter The Roll No which wii be deleted : "

          read rno

          search=` grep -c -i "$word" dbms `

          if [ $search -eq 0 ]

          then

          echo " no such roll no. exist in the file "

          else

          grep -v "$rno" dbms > temp

          mv temp dbms

          echo " The data has been deleted "

fi

;;

        7)exit;

;;

        *)echo " Invalid entry"

;;

esac

done

[ Read More ]

Posted by Unknown at 9:05 PM 0 comments

shell script to find prime number

echo "Enter the limit : "

read no

i=2

while [ $i -le $no ]

do

j=1

flag=0

while [ $j -le $i ]

do

 m=`expr $i % $j`

 if [ $m -eq 0 ]

 then

 flag=`expr $flag + 1`

if [ $flag -gt 2 ]

then

break

fi

fi

 j=`expr $j + 1`

done

 if [ $flag -eq 2 ]

 then

 echo $i

fi

i=`expr $i + 1`

done

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Posted by Unknown at 9:04 PM 0 comments

Head-Tail command example [shell script]

if [ $# -ne 2 ]

then

echo " invalid argument "

exit

fi

if [ ! -e $1 ]

then

echo "invalid file name "

exit

fi

echo " 1. head "

echo " 2. tail "

read ch

case "$ch" in

1)exec < $1

i=1

while [ $i -le $2 ]

do

read l

echo $l

i=`expr $i + 1`

done ;;

2)exec < $1

i=1

while read l

do

i=`expr $i + 1`

done

j=`expr $i - $2`

k=1

exec < $1

while [ $k -lt $j ]

do

read l

k=`expr $k + 1`

done

while read l

do

echo $l

done ;;

*) echo "invalid choice" ;;

esac

[ Read More ]

Posted by Unknown at 9:03 PM 0 comments

Fibonacci series using shell script

echo Enter the number

read n

i=0

b=1

a=0

echo " The fibonaci series is :"

while [ $i -lt $n ]

do

   echo $b

   b=`expr $a + $b`

   a=`expr $b - $a`

   i=`expr $i + 1`

done

[ Read More ]

Posted by Unknown at 9:02 PM 0 comments

date command shell script

if [ `date +%H` -lt 12 ]

then

echo "Good Morning"

elif [ `date +%H` -lt 16 ]

then

echo "Good After Noon"

else

echo "Good evening"

fi

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Posted by Unknown at 9:01 PM 0 comments

File comparison using shell script

if [ $# -ne 2 ]

then

echo " invalid argument "

fi

if [ ! -f $1 ]

then

echo "file $1 is not exist "

fi

if [ ! -f $2 ]

then

echo " file $2 is not exist "

fi

if cmp $1 $2 >> \dev\null

then

echo " The files are same"

tac $1 > $2

rev $2 > $1

rm $2

echo The content of file $1 is :

cat $1

else

echo " The files are not identical "

fi

[ Read More ]

Posted by Unknown at 9:00 PM 1 comments

Simple calculator using shell script

echo Enter The Two Numbers

read a

read b

echo enter operation

read op

ans1=`echo scale=2";" $a "$op" $b | bc`

echo the answer is $ans1

[ Read More ]

Pages

Timer using Visual C++

[C CODE] Process scheduling techniques

[C CODE] Memory management techniques

[shell script]Directory operations example

DBMS using shell script

shell script to find prime number

Head-Tail command example [shell script]

Fibonacci series using shell script

date command shell script

File comparison using shell script

Simple calculator using shell script

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