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Transfering data into a textfile

spagecko (2)
Write your quetstion here.
Main question I am trying to pass the smallest value and the second smallest value on each array( except for the chars) to its own text file I was able to get the data in descending order in the file but when it printed the smallest values it printed out junk

side question : How can I print the floats in descending order with out loosing possible data

side question 2 :How can I avoid the corruption message I get every time I run this program
Ps I know this is pretty lousy formatting and I am sorry for that




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#include <iostream>
#include<fstream>
using namespace std;

template <class T>
void load(T *a , const int n)
{ 
    for (int i = 0; i < n; i++)
	{  
           cout <<"enter data \n"; 
           cin>>a[i];
	}

}


template <class T>                                    
int small(T *a, const int n)
{ 
	T smallest;   
	T secondsmallest;
		if (a[0] < a[1]) 
		{
		smallest = a[0];
		secondsmallest = a[1];
		}		
	
		else 
		{
		smallest = a[1];
		secondsmallest = a[0];
		}
							

	for(int i = 2; i < n; i++) 
	{
		if (a[i] < smallest) 
		{
       
		secondsmallest = smallest;
		smallest = a[i];
		}
	
		else if (a[i] < secondsmallest) 
		{
		
		secondsmallest = a[i];

		}
    
	}


        cout<<"the smallest data is "<< smallest<< endl; 
	cout<< "the 2nd smallest data is" << secondsmallest<< endl; 
		
return smallest, secondsmallest; 

}


template <class T>
void decend(T *a , const int n)
{
    int i,j,t;

	for(i = 0; i < n - 1; i++)
	for(j = 0; j < n - 1; j++)
	         
                 if (a[j] < a[j+1])
		{
		         t = a[j];
			a[j] = a[j+1];
			a[j+1] = t;
		}
        

}






template <class T> // no decen
void savearray1(T *a , const int n)
{
	ofstream outfile("c:\\HW2_char.dat", ios::out);
		
		for (int i = 0; i<n; i++)
		{ 
                outfile << a[i]<<' '<<endl;
		}
	

outfile.close();

}


template <class T> //no decend
void retrivearray1(T *a , const int n){
	
	ifstream infile("c:\\HW2_char.dat", ios::in);
	
	for (int i = 0; i<n; i++) 
	{
    	infile >> a[i]; 
	}
	

infile.close();

}


template <class T>// 6 ay
void savearray2(T *a, T *smallest, T *secondsmallest, const int n)
{
	ofstream outfile("c:\\HW2_int.dat", ios::out);
    for (int i = 0; i<n; i++)
    {  
		outfile << a[i]<<' '<<endl;
     } 
	
outfile<<"The smallest int is"<<' '<<smallest<<endl;
outfile<<"The next smallest int is"<<' '<<secondsmallest<<endl;

outfile.close();

}

template <class T>
void retrivearray2(T *a ,T *smallest, T *secondsmallest,  const int n)
{ 
 
 ifstream infile("c:\\HW2_int.dat", ios::in);
   
   for (int i = 0; i<n; i++)
     { 
		infile >> a[i]; 
     }
 
cout << smallest<<endl;
cout << secondsmallest<<endl;
   
 infile.close();
}


template <class T>
void savearray3(T *a ,T *smallest, T *secondsmallest,  const int n)
{
ofstream outfile("c:\\HW2_float.dat", ios::out);
    for (int i = 0; i<n; i++)
    {    
		outfile << a[i]<<' '<<endl;
     }
	
outfile<<"The smallest float is"<<' '<<smallest<<endl;
outfile<<"The next smallest float is"<<' '<<secondsmallest<<endl;

outfile.close();

}


template <class T>
void retrivearray3(T *a ,T *smallest, T *secondsmallest,  const int n)
{ 
	ifstream infile("c:\\HW2_float.dat", ios::in);
   
	for (int i = 0; i<n; i++)
    { 
		infile >> a[i]; 
     }

cout << smallest<<endl;
cout << secondsmallest<<endl;
		
infile.close();

}
    

template <class T>
void printarray (T *a, const int n)
{ 
    for (int i = 0; i < n; i++)
        cout << a[i] << "  ";
		cout << endl;
}

int main()
{   
    const int  n1 = 5, n2 = 7, n3 = 6;
	
    int a[n1];
	int  sint[1], sint2[1];
	float b[n2];
	float sloat[1], sloat2[1]; 
	char c[n3];
   
	cout<<"enter code letter no more then 1 letter is allowed\n";
	load(c,n1);    
	cout<<"the code letters are\n";
        savearray1(c,n1);
        retrivearray1(c,n1);
        printarray(c, n1);
    
  
        cout<<"enter the ints\n";
        load(a, n2 );
        small(a, n2 );
        cout <<" sorted the integer array\n" << endl;
        decend(a, n2);
	printarray(a, n2);
        savearray2(a, sint, sint2, n2);
        retrivearray2(a,sint, sint2, n2);
   
    
	cout<<"enter the floats\n"; 
         load(b,n3);
         small(b,n3);
         cout <<" sorted the float array" << endl;
         decend(b,n1); printarray(b, n3);
	 printarray(b, n3);
         savearray3(b,sloat, sloat2, n3);
         retrivearray3(b,sloat, sloat2, n3);
	
    
system ("pause"); 
    
return 0;
}


edit I tried reformatting this but this text box dose not like the whitesmiths style
Last edited on
condor (271)
Your code is unreadable. Please use the rules of identation. Take a look here:

http://en.wikipedia.org/wiki/Indent_style
spagecko (2)
Ok how about thisI edit.
condor (271)
I was very busy, so here me with an attempt according your questions:

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[code]#include <iostream>
#include <fstream>

using namespace std;

void descInt(int *, int);
void descFlo(float *, int);
void saveArray1(char *, int);
void saveArray2(int *, int);                // used functions prototypes
void saveArray3(float *, int);
int retriveArray1(char *);
int retriveArray2(int *);
int retriveArray3(float *);

int main()
{
	int nC = 100;							//
	int nI = 100;							//
	int nF = 100;							//	
	char *nChar = new char[nC];    			//	a temporary dynamic memory allocation 	
	int *nInt = new int[nI];				        //
	float *nFlo = new float[nF];		        	//
	
	string answer;
	cout << "Read or Write data (r/w)? ";   //  Options: write new data or read old ones.
	cin >> answer;				     //  FOR THE FIRST time SELECT WRITE OPTION: w
	if(answer == "w")
	{
		cout << "How many code letter?: ";  //
		cin >> nC;                          //
		cout << "How many integers?: ";     //  user's data 
		cin >> nI;                          //   options
		cout << "How many floats?: ";   	//  
		cin >> nF;						    //
		
		char *nChar = new char[nC];			//  
		int *nInt = new int[nI];			//   reallocation according real data
		float *nFlo = new float[nF];        //
	
		cout << "Enter " << nC << " code letter\n"; //
		for(int i = 0; i < nC; ++i)                 //
		{                                           //
			cout << i + 1 << "  ";                  //
			cin >> nChar[i];                        //
		}                                           //
		saveArray1(nChar, nC);                      // 
		                                            //
		cout << "Enter " << nI << " integers\n";    // 
		for(int i = 0; i < nI; ++i)                 //
		{                                           //
			cout << i + 1 << "  ";                  //
			cin >> nInt[i];                         //
		}                                           // entering and saving user's data
		descInt(nInt, nI);							// 
		saveArray2(nInt, nI);                       // 
													//
		cout << "Enter " << nF << " floats\n";      //
		for(int i = 0; i < nF; ++i)                 //
		{                                           //
			cout << i + 1 << "  ";                  //
			cin >> nFlo[i];                         //
		}                                           //
		descFlo(nFlo, nF);                          //
		saveArray3(nFlo, nF);                       //
		
	}
	else if(answer == "r")
	{
		int nC = retriveArray1(nChar); // 
		int nI = retriveArray2(nInt);  //  reads how many char, integer and floating numbers are
		int nF = retriveArray3(nFlo);  //                  written in files
	
		char *nChar = new char[nC];    // 
		int *nInt = new int[nI];	   //  redim arrays according those numbers
		float *nFlo = new float[nF];   // 
		
		nC = retriveArray1(nChar);     // 
		nI = retriveArray2(nInt);      //  reads the contents of the char, integer and floating arrays
		nF = retriveArray3(nFlo);      // 
		
		for(int i = 0; i < nC ; ++i)   //  displays the code letter array
			cout << nChar[i] << ' ';
		cout << "\n\n";
		for(int i = 0; i < nI; ++i)    //  displays the integer array
			cout << nInt[i] << ' ';
		cout << "\n\n";	
		for(int i = 0; i < nF; ++i)    //  displays the floating array
			cout << nFlo[i] << ' ';
		cout << "\n\n";
		
		cout << "Smallest integer = " << nInt[nI - 1] << '\n';
		cout << "SecondSmallest integer = " << nInt[nI - 2] << '\n';
		cout << "Smallest floating = " << nFlo[nF - 1] << '\n';
		cout << "SecondSmallest floating = " << nFlo[nF - 2] << "\n\n";
		
	}
	
	delete[] nChar; 
	delete[] nInt; // memory release before exit
	delete[] nFlo;
	
	system ("pause");
	return 0;
}

void descInt(int *a, int n)   // Bubble sorting (descending) for integers array
{
    int temp;
    bool flag = true;
	for(int i = 0; (i <= n) && flag; ++i)
	{
		flag = false;
		for(int j = 0; j < n - 1; ++j)
			if (a[j] < a[j+1])  // change with > for ascending
			{
				temp = a[j];
				a[j] = a[j+1];
				a[j+1] = temp;
				flag = true;
			}
	}
}

void descFlo(float *a, int n) // The same for floating array
{
    float temp;
    bool flag = true;
	for(int i = 0; (i <= n) && flag; ++i)
	{
		flag = false;
		for(int j = 0; j < n - 1; ++j)
			if (a[j] < a[j+1])
			{
				temp = a[j];
				a[j] = a[j+1];
				a[j+1] = temp;
				flag = true;
			}
	}
}

void saveArray1(char *a, int n)
{
	ofstream outfile("c:\\HW2_char.dat", ios::out);
	outfile << n << endl;
	for (int i = 0; i < n; i++)
        outfile << a[i] << ' ' << endl;
	outfile.close();
}

void saveArray2(int *a, int n)
{
	ofstream outfile("c:\\HW2_int.dat", ios::out);
	outfile << n << endl;
	for (int i = 0; i < n; i++)
        outfile << a[i] << ' ' << endl;
	outfile.close();
}

void saveArray3(float *a, int n)
{
	ofstream outfile("c:\\HW2_float.dat", ios::out);
	outfile << n << endl;
	for (int i = 0; i < n; i++)
        outfile << a[i] << ' ' << endl;
	outfile.close();
}


int retriveArray1(char *a)
{
	ifstream infile("c:\\HW2_char.dat", ios::in);
	int n;
	infile >> n;
	for (int i = 0; i < n; i++) 
    	infile >> a[i];
	infile.close();
	return n;
}


int retriveArray2(int *a)
{
	ifstream infile("c:\\HW2_int.dat", ios::in);
	int n;
	infile >> n;
	for (int i = 0; i < n; i++) 
    	infile >> a[i];
	infile.close();
	return n;
}


int retriveArray3(float *a)
{
	ifstream infile("c:\\HW2_float.dat", ios::in);
	int n;
	infile >> n;
	for (int i = 0; i < n; i++) 
    	infile >> a[i]; 
	infile.close();
	return n;
}

ATTENTION: for the first time choose the option w (write) to generate for the first time those files: char, int and float. A new rerun choose r (read) option to see the contents of the previously written files.
I suppose this attempt to be more appropriate code for you taking into account the usage of pointers for the memory dynamic allocation which is a powerful c++ tool.
I hope helps.
Last edited on
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