Tag Archives: cpp

C++ Program To Push To And Pop From Stack

#include<iostream.h>
#include<conio.h>
#include<iomanip.h>
#include<stdlib.h>

class NODE
{
	public:
		int key;
		NODE * next; 
		NODE(int n);
};

NODE * root;

void push(int n)
{
	NODE *p;
	p=new NODE(n);
	p->next=root;
	root=p;
}

void pop(int & item)
{
	if(root == NULL)
	{ 
		cout<<"Error!!";
		exit(1);
	}
	else
	{
		item=root->key;
		root=root->next;
	}
}

void show()
{
	NODE * q;
	q = root;
	int i=0;
	while(q!=NULL)
	{
		cout<<q->key<<" , ";
		q=q->next;
		if(++i > 10) break;
	}
	cout<<endl;
}

int main()
{
	cout<<"Program stack.cpp starts..."<<endl;
	int i, dataindex, item;
	int Data[10] = {12,14,76,48,10,33,42,98,23,57};
	int Operation[10] = {1,1,1,0,1,0,0,1,0,1};
	root = NULL;
	dataindex = 0;
	for(i=0;i<10;i++)
	{
		if(Operation[i]==1)
		{
			push(Data[dataindex]);
			cout<<"Pushed..."<<Data[dataindex]<<" Stack-> ";
			dataindex++;
			show();
		}
		else
		{
			pop(item);
			cout<<"Popped"<<item<<"Stack-> ";
			show();
		}
	}
	getch();
	return 0;
}

NODE::NODE(int n)
{
	key = n;
	next = NULL;
}

C++ program to perform operations on a text file

#include<fstream.h> 
#include<conio.h>
#include<stdlib.h>

class text_file
{
	char ch;
	char fname[11];
	char fname1[11];
	ifstream ifile;
	ofstream ofile;
public:
	void write()
	{
		cout<<"\nEnter file name(to be created):";
		cin>>ch;
		ofile.open(fname);
		if(!ofile)
		{
			cout<<"\n\n ERROR!!";
			exit(1);
		} 
		cout<<"\nEnter data.....\n(press ESc. to exit editor)";
		while(ch!=(char)27)
		{
			ofile.put(ch);
		}
		ofile.close();
	}
	void read()
	{
		cout<<"\nEnter file name(to be read):";
		cin>>fname;
		ifile.open(fname);
		if(!ifile)
		{
			cout<<"\n\n ERROR!!";
			exit(1);
		} 
		cout<<"\nData is displayed now...";
		while(ifile)
		{
			ifile.get(ch);
			cout<<ch;
		}
		ifile.close();
	}
	void copy()
	{
		cout<<"\nEnter file name(source):";
		cin>>fname;
		ifile.open(fname);
		if(!ifile)
		{
			cout<<"\n\n ERROR!!";
			exit(1);
		}
		cout<<"\nEnter file name(destination):";
		cin>>fname1;
		ofile.open(fname1);
		if(!ofile)
		{
			cout<<"\n\n ERROR!!";
			exit(1);
		} 
		cout<<"\nData is copied";
		while(ifile)
		{
			ifile.get(ch);
			ofile.put(ch);
		}
		ifile.close();
		ofile.close();
	}
	void cut()
	{
		cout<<"\nEnter file name(source):";
		cin>>fname;
		ifile.open(fname);
		if(!ifile)
		{
			cout<<"\n\n ERROR!!";
			exit(1);
		}
		cout<<"\nEnter file name(destination):";
		cin>>fname1;
		ofile.open(fname1);
		if(!ofile)
		{
			cout<<"\n\n ERROR!!";
			exit(1);
		} 
		cout<<"\nData is cut and pasted !!";
		while(ifile)
		{
			ifile.get(ch);
			ofile.put(ch);
		}
		ofile.close();
		ifile.close();
		remove("fname");
	}
};

int main()
{
	int opt;
	text_file t;
	cout<<"\n1. Create";
	cout<<"\n2. Read";
	cout<<"\n3. Copy";
	cout<<"\n4. Cut";
	cout<<"\nEnter option";
	cin>>opt;
	switch(opt)
	{
		case 1: t.create();
			break;
		case 2:	t.read();
			break;
		case 3:	t.copy();
			break;
		case 4:	t.cut();
			break;
		default: cout<<"\nWrong option!!";
	}
	return 0;
}