fstream problem

[denny706]

Write a program that reads in a C++ program from a cpp file, and prints all non-keyword identifiers into a text file. An identifier is a series of characters consisting of letters, digits and underscores (_). Assume that all comments are single-line comments which begin with //. Consider the following program:

// Fig. 6.20: fig06_20.cpp
// Demonstrating C++ Standard Library class template vector.
#include <iostream>
#include <iomanip>
#include <vector>
using namespace std;

void outputVector( const vector< int > & ); // display the vector
void inputVector( vector< int > &, int start ); // input values into the vector

int main()
{
vector< int > integers1( 7 ); // 7-element vector< int >
vector< int > integers2( 10 ); // 10-element vector< int >

// print integers1 size and contents
cout << "Size of vector integers1 is " << integers1.size()
<< "\nvector after initialization:" << endl;
outputVector( integers1 );

// print integers2 size and contents
cout << "\nSize of vector integers2 is " << integers2.size()
<< "\nvector after initialization:" << endl;
outputVector( integers2 );

// input and print integers1 and integers2
cout << "\nEnter 17 integers:" << endl;
inputVector( integers1, 1 );
inputVector( integers2, integers1.size() + 1 );

cout << "\nAfter input, the vectors contain:\n"
<< "integers1:" << endl;
outputVector( integers1 );
cout << "integers2:" << endl;
outputVector( integers2 );

// use inequality (!=) operator with vector objects
cout << "\nEvaluating: integers1 != integers2" << endl;

if ( integers1 != integers2 )
cout << "integers1 and integers2 are not equal" << endl;

// create vector integers3 using integers1 as an
// initializer; print size and contents
vector< int > integers3( integers1 ); // copy constructor

cout << "\nSize of vector integers3 is " << integers3.size()
<< "\nvector after initialization:" << endl;
outputVector( integers3 );

// use assignment (=) operator with vector objects
cout << "\nAssigning integers2 to integers1:" << endl;
integers1 = integers2; // assign integers2 to integers1

cout << "integers1:" << endl;
outputVector( integers1 );
cout << "integers2:" << endl;
outputVector( integers2 );

// use equality (==) operator with vector objects
cout << "\nEvaluating: integers1 == integers2" << endl;

if ( integers1 == integers2 )
cout << "integers1 and integers2 are equal" << endl;

// use square brackets to create rvalue
cout << "\nintegers1[5] is " << integers1[ 5 ];

// use square brackets to create lvalue
cout << "\n\nAssigning 1000 to integers1[5]" << endl;
integers1[ 5 ] = 1000;
cout << "integers1:" << endl;
outputVector( integers1 );

// attempt to use out-of-range subscript
cout << "\nAttempt to assign 1000 to integers1.at( 15 )" << endl;
integers1.at( 15 ) = 1000; // ERROR: out of range
} // end main

// output vector contents
void outputVector( const vector< int > &array )
{
size_t i; // declare control variable

for ( i = 0; i < array.size(); i++ )
{
cout << setw( 12 ) << array[ i ];

if ( ( i + 1 ) % 4 == 0 ) // 4 numbers per row of output
cout << endl;
} // end for

if ( i % 4 != 0 )
cout << endl;
} // end function outputVector

// input vector contents
void inputVector( vector< int > &array, int start )
{
for ( size_t i = 0; i < array.size(); i++ )
cin >> array[ i ];
} // end function inputVector

If your program reads in the above program, the contents in the output file should appear as follows:

iostream
iomanip
vector
std
outputVector
inputVector
start
main
integers1
integers2
cout
size
endl
integers3
at
array
size_t
i
setw
cin
---------------------------------------------
bool isKeywords(char string[])
bool legal(char character)
void getIdentifiers(char line[], char identifiers[][32], int &numIdentifiers)
bool isNumber(char string[])
void store(char identifiers[][32], int numIdentifiers)

i dont know how to write. Could someone help me?

#include <iostream>
#include <fstream>
#include <string> 
using namespace::std;
const char keywords[][20] = { "auto", "break", "case", "char", "const", "continue", "default",
"define", "do", "double", "else", "enum", "extern", "float", "for",
"goto", "if", "int", "long", "register", "return", "short",
"signed", "sizeof", "static", "struct", "switch", "typedef",
"union", "unsigned", "void", "volatile", "while", "bool",
"catch", "class", "const_cast", "delete", "dynamic_cast",
"explicit", "false", "friend", "inline", "mutable", "namespace",
"new", "operator", "private", "protected", "public",
"reinterpret_cast", "static_cast", "template", "this", "throw",
"true", "try", "typeid", "typename", "using", "virtual", "include" };

// read in a C++ program from a cpp file, and put it to the array "program".
void load(char program[][200], int &numLines){
	
	ifstream infile;
	infile.open("Source.cpp");
	int i = 0;
	while (infile >> numLines){
		program[i][200] = numLines;
		
	}
	
		infile.close();
}

void deleteComments(char line[]){
	
	int i = 0;

	while (line[i] != '\0' && (line[i] != '/' || line[i + 1] != '/'))
		i++;

	if (line[i] == '/' && line[i + 1] == '/')
	{
		line[i] = '\0';
		return;
	}

}// if there is a single-line comment in "line", delete it.

void deleteStringConstants(char line[]){
	int b = 0;
	int e;
	while (line[b] != '\0')
	{
		while (line[b] != '\0' && line[b] != '"')
			b++;
		if (line[b] == '\0')
			break;
		e = b + 1;
		if (line[e] == '\0')
			break;
		while (line[e] != '\0' && (line[e - 1] == '\\' || line[e] != '"'))
			e++;
		if (line[e] == '\0')
			break;
		for (int i = b; i <= e; i++)
			line[i] = ' ';
		b = e + 1;
	}
}
// if there are string constants in "line", delete them.

void deleteCharacterConstants(char line[]){
	
	int i;
	int len = strlen(line);
	int rem = 1;

	
	for (i = rem; i < len - 1; i++) line[i] = line[i + 1];
	if (i < len) line[i] = '\0';

}// if there are character constants in "line", delete them.

// put all identifiers in "line" into identifiers[ numIdentifiers ].
void getIdentifiers(char line[], char identifiers[][32], int &numIdentifiers){
	int e = 0;
	for (int i = 0; i <= 32; i++)
		identifiers[e][32] = line[i];
		
		
}
	





// if character is a letter, digit or underscore, then return true, otherwise return false.
bool legal(char character){
	int i = 0;
	
	if ((character == 95) || (character == 48 - 57) || (character == 65 - 90 || character == 97 - 122))
		return 1;
	else
		return 0;
	
		
	
}

// print all non-number, non-keyword strings in "identifiers" into a text file.
void store(char identifiers[][32], int numIdentifiers){

	ofstream out("a.txt", ios::out);
	if (!out)
	{
		cerr << "File could not be opened." << endl;
		exit(1);
	}
	identifiers[][32]=a
	out << a << endl;
	
	out.close();
}

bool isNumber(char string[]){
	int i = 0;

	while (string!="/0")
	if (string[i] == 65 - 90)
		return 1;
	return 0;
		
}
// if "string" consists of digits only, then return true, otherwise return false.

bool isKeywords(char string[]){
	if (string[] == keywords[])
		return 1;
		
	return 0;

}// if "string" is a keyword of C++, then return true, otherwise return false.

// if there is a nonnegtive integer i < pos such that identifiers[ pos ] is equal to identifiers[i],
// then return true; otherwise return false.
bool isDuplicate( char identifiers[][ 32 ], int pos );



int main()
{
	

	
	char program[ 1000 ][ 200 ];
   int numLines = 0;

   load( program, numLines ); // reads in a C++ program from a cpp file, and put it to the array program.

   char identifiers[ 2000 ][ 32 ];
   int numIdentifiers = 0;

   for( int i = 0; i < numLines; i++ )
   {
      deleteComments( program[ i ] ); // if there is a single-line comment in program[ i ], delete it.
      deleteStringConstants( program[ i ] ); // if there are string constants in program[ i ], delete them.
      deleteCharacterConstants( program[ i ] ); // if there are character constants in program[ i ], delete them.
      if( strcmp( program[ i ], "" ) != 0 )
         
         getIdentifiers( program[ i ], identifiers, numIdentifiers );
   }

   // print all non-number, non-keyword strings in "identifiers" into a text file.
   store( identifiers, numIdentifiers );

	system( "pause" );
}