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.