How to Create Bool Function and Check the File for specific characters?

[john dhoe]

I got stuck with creating 2 functions:
- bool oneAt(char email[] ); - to check if each email has ONLY one “@” character.
- bool oneDot(char* email); - to check if each email has ONLY one “.” (dot).

Can somebody help?

Here's my code:

 

#include <iostream>
#include <fstream>
#include <cstring>
#include <sstream>
#include <stdlib.h>
using namespace std;

bool oneAt(char email[]);

const unsigned MaxRecLen = 80;
const unsigned MaxFileName = 200;

int main()
{
	ifstream inF;
	ofstream of;

	char infile[ MaxFileName + 1 ],
	     outfile [ MaxFileName + 1 ];
	char email [ MaxRecLen ];
	
		
		cout << "Enter File Name: ";
		cin >> infile;
		cout << "Output File: ";
		cin >> outfile;

	inF.open( infile );	
	of.open( outfile );

	inF.getline (email, MaxRecLen );
	
	while (strlen(email)){
		if(strlen(email) < 0){
		}
		of << email << endl;
		inF.getline(email, MaxRecLen);
	}
	inF.close();   
	of.close();
	return 0;
}

[Markus]

We won't write the code for us. Show us what you have tried.

[john dhoe]

Didn't I write the code above?:-)

[Markus]

Sure, but the code above isn't the code you're having trouble with.

[john dhoe]

Exactly. I can't go further, because I don't know how. How can I write code if I don't know what to write?
That's why I posted the problem here...

[Rabbit]

The general idea is to use a loop to step through the array and check the ASCII character code while keeping a count of the character you're looking for.

[john dhoe]

hi! could you please check my code & tell why it's not working? it doesn't output what it is supposed to... here's my code:

#include <iostream>
#include <fstream>
#include <cstring>
#include <sstream>
#include<conio.h>
using namespace std;


const unsigned MaxRecLen = 80;
const unsigned MaxFileName = 200;
bool oneAt(char email[])
	{
	int atFound = 0;
	
	if(email[0] == '@')
		atFound=2;

	for(int i = 0; i < strlen(email); i++)
	{
    if(email[i] == '@')
    atFound++;
	}
	if(atFound>1)
		return false;
	else
		return true;			
 }
void main()
{
	ifstream inF;
	ofstream of;

	char infile[ MaxFileName + 1 ],
	     outfile [ MaxFileName + 1 ];
	char email [ MaxRecLen ];	
		
		cout << "Enter File Name: ";
		cin >> infile;	
		
	inF.open( infile );	
	of.open( outfile );
	
bool a;

	while (!inF.eof() )    
     {
      //   if(oneAt(inF.getline (email, MaxRecLen) ))
		 cout<<inF.getline (email, MaxRecLen );

		
		 /*if(oneAt(b))
			 cout << b << endl;*/
     }	
	inF.close();   
	of.close();
	
	getch();
}

[Rabbit]

It would help if we knew what it was outputting that it's not supposed to.