// Chapter 12, Program Challenge 6 - string search
// This program will search for a specific string (based on user input)
// in a file and then return all lines that include that string.  
#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

int main()
{
	const int SIZE = 31;				 // constant for size of character string
	char stringSearch[SIZE];			 // used to search for the string in the file
	char fileName[SIZE];				 // to hold the file name
	ifstream inputFile;				  // input file
	int counter = 0;					 // counter for counting number of string occurences
	char *stringPtr;					 // points to the string
	
	// Prompt user to select a string to search from the file
	cout << "Enter a word or string of words to search for: ";
	cin.getline(stringSearch, SIZE);
	// Get the input file name
	cout << "Enter the name of a file that you would\n";
	cout << "like to search for a string within: ";
	cin >> fileName;
	
	
	// Open the file for input.
	inputFile.open(fileName);
	if(!inputFile)
	{
		 cout << "Cannot open " << fileName << endl;
		 system("pause");
		 return 0;
	}
	
	// Search file for user-input string
	while(!inputFile.eof())
	{
		 inputFile.getline(stringSearch, SIZE);
		 cout << stringSearch;
		 cout << endl;
	}				  
	
	cout << endl;
	
	// Close the files.
	inputFile.close();
	
	system("pause");
	return 0;
}

apw5020, on 9 Jun, 2009 - 11:03 PM, said:

arobbins, on 10 Jun, 2009 - 04:44 AM, said:

arobbins, on 9 Jun, 2009 - 09:02 PM, said:

// Chapter 12, Program Challenge 6 - string search
// This program will search for a specific string (based on user input)
// in a file and then return all lines that include that string.  
#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

int main()
{
	const int SIZE = 31;				 // constant for size of character string
	char stringSearch[SIZE];			 // used to search for the string in the file
	char fileName[SIZE];				 // to hold the file name
	ifstream inputFile;				  // input file
	int counter = 0;					 // counter for counting number of string occurences
	char *stringPtr;					 // points to the string
	
	// Prompt user to select a string to search from the file
	cout << "Enter a word or string of words to search for: ";
	cin.getline(stringSearch, SIZE);
	// Get the input file name
	cout << "Enter the name of a file that you would\n";
	cout << "like to search for a string within: ";
	cin >> fileName;
	
	
	// Open the file for input.
	inputFile.open(fileName);
	if(!inputFile)
	{
		 cout << "Cannot open " << fileName << endl;
		 system("pause");
		 return 0;
	}
	
	// Search file for user-input string
	while(!inputFile.eof())
	{
		 inputFile.getline(stringSearch, SIZE);
		 cout << stringSearch;
		 cout << endl;
	}				  
	
	cout << endl;
	
	// Close the files.
	inputFile.close();
	
	system("pause");
	return 0;
}

bool SearchFileForString(const char &File_Name[],const char &key[])
{
   ifstream File(File_Name,ios::in);
   char buffer[256];

   if(!File) return false;

   while(!File.eof())
   {
        File >> buffer;
        
        if(String_Search(buffer,key))  // function String_Search required !
                return true;
   }
   return false;
}

//************************************
// NOTE:  ASCII Table, '0' to '9' are represented as 48 to 57
//************************************
// This program will search for a specific string (based on user input)
// in a file and then return all lines that include that string.  
//************************************
#include <cstring>
#include <ctime> 
#include <ctype.h>
#include <fstream>							// file I/O
#include <iomanip>							// format manipulation 
#include <iostream>
#include <limits> 
#include <map>
#include <math.h>
#include <sstream>
#include <stddef.h>
#include <stdexcept>
#include <stdio.h>
#include <stdlib.h>							// converter functions
#include <string>
using std::istringstream;
using std::ifstream;
using std::string;
using std::cout;
using std::cin;
using std::cerr;
using std::map;
using std::multimap;

using namespace std;
//************************************
//In general, C++ strings are preferred over C strings.
//************************************
void CreateExampleTxtFile();
void PrintExampleTxtFile();
void SizeExampleTxtFile();
int SearchExampleTxtFile();
//************************************
int main(int argc, char* argv[])
{
	int choice = 0;
	bool exitt = false;

	do
	{
		system("CLS");

		cout << endl << endl << endl;
		cout << "		   MENU" << endl;
		cout << "  ************************" << endl << endl;
		cout << "  1  Create new file." << endl;
		cout << "  2  Print new file" << endl;
		cout << "  3  Size new file" << endl;
		cout << "  4  Search new file." << endl << endl;
		cout << "	 Enter 0 to exit" << endl << endl;

		//test validity of user input data


		//Get customer input

		cout << "  Please type a number from 0 to 4 and then press enter ==> ";

		cin >> choice;


		switch(choice)
		{
			//Call class member functions

		case 0:

			break;

		case 1:
			CreateExampleTxtFile();
			break;

		case 2:
			PrintExampleTxtFile();
			break;

		case 3:
			SizeExampleTxtFile();
			break;

		case 4:
			SearchExampleTxtFile();
			break;

		default:
			cout << endl << endl << endl;
			cout << "  Please select again." << endl << endl;
			break;
		}

		cout << endl << endl << endl;
		cout << "  Type the number 1 and press return to run this program again." << endl << endl << endl;
		cout << "  Type any key and press return to exit ==> ";

		cin >> choice;

		if (choice == 1)
			exitt = false;
		else
			exitt = true;
	}while(exitt == false);

	cout << endl << endl << endl;
	cout << "  ";
	system("PAUSE");

	return 0;
}
//************************************
//This function creates a file named example.txt
//and inserts six sentences into example.txt. 
void CreateExampleTxtFile()
{
	ofstream myfile;
	myfile.open ("example.txt");
	if (myfile.is_open())
	{
		myfile << "one two three four five\n";
		myfile << "two three four five six\n";
		myfile << "three four five six seven\n";
		myfile << "four five six seven eight\n";
		myfile << "five six seven eight nine\n";
		myfile << "six seven eight nine ten\n";
		myfile.close();
	}
	else cout << "  Unable to open file";
}

//************************************
//This function reads a file named example.txt
//and prints contents to console. 
void PrintExampleTxtFile()
{
	string line;

	ifstream myfile ("example.txt");
	system("CLS");
	if (myfile.is_open())
	{
		while (! myfile.eof() )
		{
			getline (myfile, line);
			cout << "  " << line << endl;
		}
		myfile.close();
	}

	else cout << "  Unable to open file"; 
}

//************************************
//This function prints the size of the example.txt file,
//on the console.
void SizeExampleTxtFile()
{
	long begin;
	long end;
	ifstream myfile ("example.txt");
	begin = myfile.tellg();
	myfile.seekg (0, ios::end);
	end = myfile.tellg();
	myfile.close();
	system("CLS");
	cout << endl << endl << endl;
	cout << "  File size is: " << (end - begin) << " bytes.\n";
}

//************************************
int SearchExampleTxtFile()
{
	const int SIZE = 200;				// constant for size of character string
	char fileName[SIZE];				 // to hold the file name
	ifstream inputFile;				  // input file
	int counter = 0;					 // counter for counting number of string occurences

	system("CLS");

	//************************************
	// Get user's file name
	cout << endl << endl << endl;
	cout << "  Enter the name of the file you want\n";
	cout << "  to search and press return ==> ";
	cin >> fileName;		//fileName is example.txt

	// Open user's file.
	inputFile.open(fileName);
	if(!fileName)
	{
		cout << endl << endl << endl;
		cout << "  Cannot open " << fileName << endl;
		cout << endl << endl << endl;
		cout << "  ";
		system("pause");
	}

	//************************************
	//reads a file named example.txt searches for user defined string
	//and prints results to console. 
	multimap<string, int> words;
	map<int, string> lines;
	string str;
	ifstream input("example.txt");
	if(input.fail())
	{
		cerr<<"\n  The file could not be opened.";
		return -1;
	}
	int i=1;
	while(getline(input,str))
	{
		istringstream in(str);
		string s;
		while(in>>s)
		{
			words.insert(make_pair(s,i));
		}
		lines.insert(make_pair(i,str));
		i++;
	}
	string search;
	cout << "\n  Enter a word to search: ";
	cin >> search;

	cout << "\n  The number of matches = " << words.count(search) << '\n';
	multimap < string,int>::iterator it1=words.lower_bound(search);
	multimap < string,int>::iterator it2=words.upper_bound(search);
	while(it1 != it2)
	{
		int x=it1->second;
		map<int,string>::iterator iter = lines.find(x);
		cout << '\n' << x << " ) " << iter->second << '\n';
		it1++;
		while(true)
		{
			if(it1 != it2 && it1->second == x)
			{
				it1++;

			}
			else
			{
				break;
			}
		}
	}
	return 0;
}

This post has been edited by apw5020: 10 June 2009 - 01:27 PM

apw5020, on 10 Jun, 2009 - 01:26 PM, said:

This post has been edited by apw5020: 10 June 2009 - 03:03 PM