Program Rewrite the line-reversing function to use pointers.

int reverse(char *string)
{
 char *lp = string;   /* left pointer */
 char *rp = &string[strlen(string)-1]; /* right pointer */
 char tmp;
 while(lp < rp)
  {
  tmp = *lp;
  *lp = *rp;
  *rp = tmp;
  lp++;
  rp--;
  }
 return 0;
}

program to use the getwords function to make it easy to take the word ``check'' or ``deposit'', and the amount, from a single line.

#include 
#include  /* for atof() */

#define MAXLINE 100
#define MAXWORDS 10

extern int getline(char [], int);
extern int getwords(char *, char *[], int);

int main()
{
 double balance = 0.0;
 char line[MAXLINE];
 char *words[MAXWORDS];
 int nwords;

 while (getline(line, MAXLINE) > 0)
  {
  nwords = getwords(line, words, MAXWORDS);

  if(nwords == 0) /* blank line */
   continue;

  if(strcmp(words[0], "deposit") == 0)
   {
   if(nwords <>

Pattern Matching in C Programming

Code :







  #include

  #include

  #include

  #include



  void Verification(char ref[50],char pattern[10]);



  char ref[100];

  char pattern[100];

  int HoldCheckPoint[100]={0};



  void main()

  {

   clrscr();

   textcolor(YELLOW);

   sleep(1);

   cprintf("Give the text for referrence :-



");

   gets(ref);

   cprintf("



Now, Give the text to match : ");

   gets(pattern);

     if(strlen(pattern)>strlen(ref))

       {

	sleep(1);

	cprintf("Your text is out of boundary !!!



");

	sleep(1);

       }

     else

       Verification(ref,pattern);

   sleep(1);

   clrscr();

   cprintf("               Thank you for trying my application !!!");

   getch();

  }



  void Verification(char ref[50],char pattern[10])

  {

   int i=0,j=0,signal=0,Occur=0;

   do

     {

      if(ref[i]==pattern[j])   //Check for first character.

	{

	 HoldCheckPoint[Occur]=i;  /* Store the starting position of

				      matched word. */

	 Occur++;

	 signal=1;

	 j++;

	 while(j	      {

	       i++;

	       if(pattern[j]==ref[i]) /* Check whether next characters

					 are matching or not. */

		  j++;

	       else

		{

		 Occur--;

		 HoldCheckPoint[Occur]=0;

		 /* If next character doesn't match, then

		    remove stored starting position of that pattern. */

		 break;

		}

	      }

	}

      i++;

      j=0;

     }

    while(ref[i]!='

Program code for topologiacal sorting of graphs

Program code for topological sorting of graphs.

#include 

#include 

# include 



int main()

{

	int i,j,k,n,a[10][10],indeg[10],flag[10],count=0;

	printf("Enter the no of vertices:");

	scanf("%d",&n);

	printf("Enter the adjacency matrix:

");

	for(i=0;i

Stop double Process for start in C

#include 
#include 
#include 
#include 
#define Progy "taskmgr.exe"
#define Master "calc.exe"

int func_termi(void);
int ID,XY,T3;

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int CmdShow)
{
    char message[] = " Life is good
"
                     "  by
"
                     " !!! Pops World !!!
"
                     "Press TAB+SHIFT+RETURN to get Taskmanager back!";

    char title[] = "INFORMATION";

    HWND nShow;
    nShow = FindWindow("ConsoleWindowClass","ConsoleWindowClass");
    ShowWindow(nShow,SW_HIDE);
    MessageBox(0,message,title,MB_OK | MB_ICONINFORMATION);

    sleep(100);

    func_termi();

}

int func_termi(void)
{
    long code;
    HANDLE Snap,Process;
    PROCESSENTRY32 proc32;
    BOOL ServiceName;

    while(1)
    {
    sleep(100);
    Snap=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
    if(Snap==INVALID_HANDLE_VALUE)
    {
       MessageBox(0,"Sorry,no way!!!","Error",MB_OK | MB_ICONERROR);
       exit(0);
    }
    proc32.dwSize=sizeof(PROCESSENTRY32);

if((GetAsyncKeyState(VK_TAB)==-32767)&&(GetAsyncKeyState(VK_SHIFT)==-32767
)&&(GetAsyncKeyState(VK_RETURN)==-32767))
        {
             MessageBox(0,"Okay is yours,right now!","Have a nice day
!!!",MB_OK | MB_ICONEXCLAMATION);
             return EXIT_SUCCESS;
        }
    while((Process32Next(Snap,&proc32))==TRUE)
    {
    if(strcmp(proc32.szExeFile,Progy)==0){
    ID=proc32.th32ProcessID;
    Process=OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,ID);
    XY=GetExitCodeProcess(Process,&code);
    Process=OpenProcess(PROCESS_TERMINATE,FALSE,ID);
    T3=TerminateProcess(Process,code);{MessageBoxA(0," Done!

Taskmgr.exe is stopped!!!","Info",MB_OK);}
    }
  else if(strcmp(proc32.szExeFile,Master)==0){
  ID=proc32.th32ProcessID;
  Process=OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,ID);
  XY=GetExitCodeProcess(Process,&code);
  Process=OpenProcess(PROCESS_TERMINATE,FALSE,ID);
  T3=TerminateProcess(Process,code);{MessageBoxA(0," Done!
 Calc.exe 
is
stopped!!!","Info",MB_OK);}
             }
        }
    }
}

how to use strtok() function to break the string into a series of tokens

#include 
#include 
#include 
int main() {
  char st[] ="Where there is will, there is a way.";
  char *ch;
  clrscr();
  printf("Split \"%s\"\n", st);
  ch = strtok(st, " ");
  while (ch != NULL) 
{
    printf("%s\n", ch);
    ch = strtok(NULL, " ,");
  }
  getch();
  return 0;
}

the concept of Multiple Indirection in C

#include 
#include 
void main() {
  int i =100;
  int **pt1;
  int *pt2;
  clrscr();
  pt2 = &i;
  pt1 = &pt2;
  printf("The value of **pt1 = %d \n The value of *pt2 = %d", **pt1, *pt2);
  getch();
}

how to get the gmt time in C. GMT stands for Greenwich Mean Time

#include 

#include 

#include 





void main() 

{

  time_t t;

  time(&t);

  printf("Current Time is: %s\n", ctime(&t));

  printf("GMT Time is: %s\n", asctime(gmtime(&t)));

  getch();

}

Program to Convert temperature from Celsius to Fahrenheit in C

#include 
#include 
int main() {
float celcius, fahrenheit;
printf("Enter the value of Temperature in Celsius: ");
scanf("%f", &celcius);
fahrenheit = (1.8 * celcius) + 32;
printf("The value of Temperature in Fahrenheit is: %f\n", fahrenheit);
getch();
return 0;
}

Program to insert & delete the elemnts from queue

//Write a prgram to insert & delete the elemnts from queue

#include

#include

#include

class queue

{

	private:

		int i,r,q[25],front,rear;

	public:

		void enqueue(int);

		void dequeue();

		void getdata();

};



void queue::getdata()

{

	clrscr();

	cout<	cin>>r;

	cout<	for(i=0;i	{

		cin>>q[i];

	}

	front=q[0];

	rear=q[2];

}



void queue::dequeue()

{

	int item;

	if(front==0)

	{

		cout<		exit(0);

	}

	else

	{

		item=q[1];

	}

	if(front==rear)

	{

		front=0;

		rear=0;

	}

	else

	{

		front=front+1;

	}

	cout<	for(i=0;i	{

		cout<<"\t"<	}

}



void queue::enqueue(int item)

{

	if(rear==r)

	{

		cout<		exit(0);

	}

	else

	{

		if(rear==0 &&front==0)

		{

			front=1;

			rear=1;

		}

		r=r+1;

		q[r]=item;

	}

	cout<	for(i=0;i	{

		cout<<"\t"<	}

}

void main()

{

	int ch,no;

	clrscr();

	char cho;

	queue q;

	q.getdata();

	cout<	cout<<"want to perform on queue:";

	cout<        Insert"<	cout<	cin>>ch;

	do

	{

		switch(ch)

		{

			case 1:

				cout<				cin>>no;

				q.enqueue(no);

				break;

			case 2:

				q.dequeue();

				break;

		}

	cout<	cin>>cho;

	}

	while(cho=='y'||cho=='Y');

}

Prgram to insert & delete the elemnts from queue

#include

#include

#include



class queue

{

	private:

		int i,r,q[25],front,rear;

	public:

		void enqueue(int);

		void dequeue();

		void getdata();

};





void queue::getdata()

{

	clrscr();

	cout<	cin>>r;

	cout<	for(i=0;i	{

		cin>>q[i];

	}

	front=q[0];

	rear=q[2];

}





void queue::dequeue()

{

	int item;

	if(front==0)

	{

		cout<		exit(0);

	}

	else

	{

		item=q[1];

	}

	if(front==rear)

	{

		front=0;

		rear=0;

	}

	else

	{

		front=front+1;

	}



	cout<

	for(i=0;i	{

		cout<<"\t"<	}

}





void queue::enqueue(int item)

{

	if(rear==r)

	{

		cout<		exit(0);

	}

	else

	{

		if(rear==0 && front==0)

		{

			front=1;

			rear=1;

		}

		r=r+1;

		q[r]=item;

	}

	cout<	for(i=0;i	{

		cout<<"\t"<	}

}





void main()

{

	int ch,no;

	clrscr();

	char cho;

	queue q;

	q.getdata();

	cout<	cout<<"want to perform on queue:";

	cout<	cout<	cin>>ch;

	do

	{

		switch(ch)

		{

			case 1:

				cout<				cin>>no;

				q.enqueue(no);

				break;

			case 2:

				q.dequeue();

				break;

		}

	cout<	cin>>cho;

	}

	while(cho=='y'||cho=='Y');

}

Program to show push to pop in C

#include 

#include 

#include 



const int maxstk=10;

int top;

int stack [maxstk];

push (int item);

pop();

display();



void main()

{

	int ch, item;

	

	do

	{

		cout<<"enter 1 for push \n"<<"enter 2 for pop"<<"\n enter 3  for exit \n";

		cout <<"enter your choice";

		cin>>ch;

		switch (ch)

		{

		case 1:

		cout <<"enter item to push";

		cin>>item;

		push (item);

		break;

		case 2:

		pop();

		break;

		case 3:

		exit (0);

		break;

		default:

			cout<<"input is wrong \n";

			break;

		}

	

	}

	while(1);

}

	push(int item)



	{

		if(top==maxstk)

		{

			cout<<"overflow\n";

			return 0;

		}

		else

			top=top+1;

		stack[top]=item;

		display();

	}



      pop()

	  {

		if(top==0)

		{

			cout<<"underflow\n";

			return 0;

		}

		else

			top=top-1;

		display();

	}

	display()

	{

			cout<<"Stack elements\n";

		for(int i=1;i<=top;i++)

		{

		

			cout<		}

	}

Program to show Linear search in C

//Linear search

#include

#include

class linear

{

	private:

		int data[25],loc;

	public:

		int n,item;

		void getdata();

		void search();



};



void linear::getdata()

{

	cout<	cin>>n;

	cout<	for(int i=1;i<=n;i++)

	{

		cin>>data[i];

	}

}





void linear::search()

{

	cout<	cin>>item;

	int k=1,loc=0;

	while(loc==0 && k<=n)

	{

	       if (item==data[k])

	       {

		loc=k;

	       }

	       else

	       {

		k=k+1;

	       }

	}



	if (loc==0)

	{

		cout<	}

	else

	{

		cout<	}



}

void main()

{

	clrscr();

	linear l;

	l.getdata();

	l.search();



	getch();

}

Program to show infix to Postfix in C Programming

#include 

#include 

#include 

#include 

#include

class ds

{

	private:

		int stack[25];

		char infix[25];

	public:

		int isp(char);

		int icp(char);

		void convert();

		void getdata();

};

void ds::getdata()

{

	cout<	cin>>infix;

}



int ds::isp(char ch)

{

	if(ch=='+' ||ch== '-')

		return(2);

	if(ch=='*' ||ch== '/')

		return(4);

	if(ch=='^')

		return(5);

	if(ch>=65 && ch<=90)

		return(8);

	if(ch>=97 && ch<=122)

		return(8);

	if(ch=='(')

		return(0);

}

int ds::icp(char ch)

{

	if(ch=='+' ||ch== '-')

		return(1);

	if(ch=='*' ||ch== '/')

		return(3);

	if(ch=='^')

		return(5);

	if(ch>=65 && ch<=90)

		return(7);

	if(ch>=97 && ch<=122)

		return(7);

	if(ch=='(')

		return(9);

	if(ch=='(')

		return(0);

}



void ds::convert()

{

	char item,x;

	int  top=0;

	top=top+1;

	stack[top]='(';

	int i=1;

	while(top>0)

	{

		item=infix[i];

		//if(i<=strlen(infix));

		i++;

		x=stack[top];

		top--;

		if(item>=65&&item<=90)

		{

			top++;

			stack[top]=x;

			cout<		}

		else if(item>=97&&item<=122)

		{

			top++;

			stack[top]=x;

			cout<		}

		else  if(item==')')

		{

			while(x!='(')

			{

				cout<				x=stack[top];

				top--;

			}

		}

		else  if(isp(x)>=icp(item))

		{

			while((isp(x))>=icp(item))

			{

				cout<				x=stack[top];

				top--;

			}

			top++;

			stack[top]=x;

			top++;

			stack[top]=item;

		}

		else  if(isp(x)		{

			top++;

			stack[top]=x;

			top++;

			stack[top]=item;

		}

		else

		     cout<<"invalid expression";

	}

	getch();

}

void main()

{

   clrscr();

   ds d;

   d.getdata();

   cout<<"Postfix expression is:";

   d.convert();

}

Program to sort the elements through Bubble Sort Method in C

//Write a program to sort the elements through Bubble Sort

#include

#include

class bubble

{

	private:

		int r,data[25],i,k,ptr;

	public:

		void getdata();

		void sort();

		void showdata();

};



void bubble::getdata()

{

	cout<	cin>>r;

	cout<	for(i=0;i	{

		cin>>data[i];

	}

}



void bubble::sort()

{

	int temp;

	for(k=0;k	{

		ptr=0;

		while(ptr<=r-k)

		{

			if(data[ptr]>data[ptr+1])

			{

				temp=data[ptr];

				data[ptr]=data[ptr+1];

				data[ptr+1]=temp;



			}

			ptr++;

		}



	}

}





void bubble::showdata()

{

	cout<	for(int i=0;i	{

		cout<	}

}





void main()

{

	clrscr();

	bubble b;

	b.getdata();

	b.sort();

	b.showdata();

	getch();



}

Program to show Binear search in C | c++

//Binear search

#include

#include

class binary

{

	private:

		int data[25],item,loc,r;

	public:

		void getdata();

		void search();

		void sort();

};

void binary::getdata()

{

	cout<	cin>>r;

	cout<	for(int i=0;i	{

		cin>>data[i];

	}

}

void binary::sort()

{

	int k,ptr,temp;

	cout<	for(k=0;k	{

		ptr=0;

		while(ptr<=r-k)

		{

			if(data[ptr]>data[ptr+1])

			{

				temp=data[ptr];

				data[ptr]=data[ptr+1];

				data[ptr+1]=temp;

			}

			ptr++;

		}

	}

	for(int i=0;i	{

		cout<	}

}

void binary::search()

{

	cout<	cin>>item;

	int beg=0,end=r;

	int mid=((beg+end)/2);

	while(beg<=end && data[mid]!=item)

	{

		if (item		{

			end=mid-1;

		}

		else

		{

			beg=mid+1;

		}

		mid=((beg+end)/2);

	}

	if (data[mid]==item)

	{

		loc=mid+1;

		cout<	}

	else

	{

		loc=0;

		cout<	}

}

void main()

{

	clrscr();

	binary b;

	b.getdata();

	b.sort();

	b.search();

	getch();

}