Thread: question

i am trying to write a program that stores words as strings into a linked list, i got it down to three errors but cant seem to fix them. here are what the errors say.......

--------------------Configuration: cpp2d - Win32 Debug--------------------
Compiling...
Cpp2e.cpp
c:\documents and settings\owner\cpp2e.cpp(169) : error C2440: 'initializing' : cannot convert from 'char' to 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >'
No constructor could take the source type, or constructor overload resolution was ambiguous
c:\documents and settings\owner\cpp2e.cpp(240) : error C2440: '=' : cannot convert from 'char [30]' to 'char'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
c:\documents and settings\owner\cpp2e.cpp(248) : error C2440: '=' : cannot convert from 'char [30]' to 'char'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
Error executing cl.exe.

Cpp2e.obj - 3 error(s), 0 warning(s)

and heres the code

Code:

#include <iostream>
#include <fstream>
#include <stddef.h>
#include <stdlib.h>
#include <ctype.h>
#include <string>

using namespace std;

struct StackFrame
{
	char data;
	StackFrame *link;
};

typedef StackFrame* StackFramePtr;


class search
{
public:
    bool check();  //declare the function check
    void output(StackFramePtr top); //declare the function output
    void input(search sight, char *file);
	void input2(search sight, char *file, StackFramePtr top);
	int a;
	int b;
	int total3;
    
private:
    int total;//variable for total number of strings
	int total2;//variable for number of characters in temp array
	int i;//variable for number of strings in array
	int j;//variable for number of characters in a string
	int m;//variable for number of characters in temp string
	int n;//variable for the insert loop
	int s;//variable for ?
    ifstream in_stream; //create an instream
	ofstream out_stream;//creat an outstream
	char array[1000][30];//create an array
	char temp[1000][30];//create an array
	char next;//variable for next character in
    
	
};

int main()
{
	char *name;
    search sight1;
	sight1.a = 0;
	sight1.b = 0;
	sight1.total3 = 0;
	StackFramePtr top;
	for(int h = 0; h < 1; h++)
	{
		if(h == 0)
		{
		   name = "washington.txt";
           sight1.input(sight1, name);
	       sight1.input2(sight1, name, top);
		}
		if(h == 1)
		{
			name = "adams.txt";
			sight1.input(sight1, name);
			sight1.input2(sight1, name, top);
		}
		if(h == 2)
		{
			name = "jefferson.txt";
			sight1.input(sight1, name);
			sight1.input2(sight1, name, top);
		}
		if(h == 3)
		{
			name = "madison.txt";
			sight1.input(sight1, name);
			sight1.input2(sight1, name, top);
		}
	}
	sight1.output(top);
	cout << " " << sight1.total3;
	return 0;
	

}

void search::input(search sight, char *file)
{
for(s = 0; s < 1000; s++)
{
   for(m = 0; m < 30; m++)
	   temp[s][m] = 'c';
}
for(i = 0; i < 1000; i++)
{
	for(j = 0; j < 30; j++)
		array[i][j] = 'c';
}
s = 0;
m = 0;
total2 = 0;
total = 0;
i = 0;
j = 0;
in_stream.open(file);
in_stream.get(next);
while(! in_stream.eof())//while next is not end of file
{
     //invariant: next is not the end of the file and next is a part of the file
	
		if(ispunct(next))
			in_stream.get(next);
		if(isspace(next))//if next is space
		{
			in_stream.get(next);/*//get next character from file
			array[i][j] = '\0';//put null to end current string
		    j = 0;//bring number of characters back to zero
			i++;//start a new string
			total++;//add one to total number of strings*/
		}
		else//if next is not a space
		{
			while(isalnum(next))
			//invariant: next is either a letter or a number and next is a part of the file
			{
				temp[s][m] = tolower(next);//put next into temp array
			    m++;//go to next place in temp array
				total2++;//add one to total number of temp characters in temp string
				in_stream.get(next);//get next character from file
			}
		
			temp[s][m] = '\0';
			m = 0;//bring back to first character in temp string
			if(check())//if temp string already in array
			{
				in_stream.get(next);//get next character from file
			    s++;
			}
            
	        else//if temp string not already in array
			{
				for(n = 0; n < total2; n++)//for every character in temp array
				//invariant: n is less than total2 and has a place in the array
				{
					array[i][j] = temp[s][n];//add temp character to current place in array
				    j++;//go to next place in current array
				}
				array[i][j] = '\0';
			    in_stream.get(next);//get next character from file
				i++;//start a new string
				total++;//add one to total number of strings
				total2 = 0;//reset number of characters in temp string back to zero
				s++;
				if(! in_stream.eof())
					j = 0;
			}
		}
	
}
in_stream.close();
}

void search::output(StackFramePtr top)
{
    while(top != NULL)
	{
		string result = top->data;
		StackFramePtr temp;
		temp = top;
		top = top->link;
		delete temp;
		cout << result;
	}

}

bool search::check()//function defenition
{
	int sum = 0;//represents sum of coorect letters
	int answer = 0;
	int numstring;//represents string of array
	int x;
	int l = 0;
	int f = 0;
    int totalchar;
	if(total == 0)
		return false;
	for(numstring = 0; numstring < total; numstring++)//loops through all strings in array
	//invariant: numstring is less than c and a[numstring][f] is part of an array
	{   
		totalchar = 0;
        for(f = 0; array[numstring][f] != '\0'; f++)
		//invariant: a[numstring[f] does not equal a null character and a[numstring][f] is part of an array
		{
			if(isalnum(array[numstring][f]))
				totalchar++;
		}
        l = 0;
		sum = 0;
		x = 0;
		while((array[numstring][l] != '\0') || (temp[s][x] != '\0'))
		// a[numstring][l] and b[t][x] are both not null characters and they are both parts of arrays
		{
			 if(array[numstring][l] == temp[s][x])
			 {
			    sum++;
				if(temp[s][x] != '\0')
			      x++;
				if(array[numstring][l] != '\0')
				  l++;
			 }
		     else
			 {
				 if(temp[s][x] != '\0')
				   x++;
				 if(array[numstring][l] != '\0')
			       l++;
			 }
		     if((sum == total2) && (x == l) && (totalchar == sum))
		        answer = 1;
		}
		
	}
	if(answer == 1)
		return(true);
    else
	    return(false);
	
}

void search::input2(search sight, char *file, StackFramePtr top)
{
	int j = 0;
	array[i][j] = '?';//add a question mark to current place in array to signal end of array
    i = 0;//reset current string to first string
	j = 0;//reset current character to first character
	top = new StackFrame;
	top->data = array[i];
	top->link = NULL;
	i++;
	while(array[i][j] != '?')//while not end of array
	//invariant: array[i][j] is not a question mark and array[i][j] is part of an array
	{
		StackFramePtr temp;
		temp = new StackFrame;
        temp->data = array[i];
		i++;
		temp->link = top;
		top = temp;
	}
}

String is not the same things as char[], and char[] is not the same thing as char. Data is a char, but you try and assign string result to equal it. You also try and assign data to equal array[i]. You need to make all of them char[]'s or strings. And if you use char[] you have to use string copy and not =. Or at least I hear anyways, I only really use strings

169 - like it says, you can't do that (string = char), use "+=" string operator instead.
240,248 - you have type "char" on the left of "=", and type "char[30]" on the right - "char = char[30]" ain't right.

gg