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C++ techs help me!


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#1
Encrypted Devil

Encrypted Devil

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heyyy geeks...
i m a learner in OOP C++ programming...
d problem dat i m facing is the abrupt termination of C++ when i execute a program...let me explain in detail..

wen i run a program..smtimes it runs well and fine widout any problem...but wen i exit the program the TC.exe terminates abruptly :) ....(it also hapens at time wen a fatal error occurs..hwever its natural... :) )

i thnk d reason behind mite be like dis : during d program execution...somehow d memory location of TC.exe mite be gettin overwritten by some or d other component of d program...however dis is my guess... :) :) :)

sooo...is dere neone who can help me out here ??? i want a perfect reason and a solution to that....
:)
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#2
Granz00

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Got any code for us to look at? Got anything else than what you provided? It doesn't seem like you provided anything at all except the knowledge that you have a problem...
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#3
Encrypted Devil

Encrypted Devil

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okkk...
here is my code..
look at the code with ease... :)

//Program implementing a string class and all the related
//operations...

#include "iostream.h"
#include "conio.h"
#include "stdlib.h"


class strings //Class definition
{
char *string; //for the string data

public:
int len; //for lenght of string

strings() //Default constructor
{*string = NULL;len = 0;}

strings(char *a) //Parameterized constructor
{
len = str_len(a);
/*while (*a)
len++;*/
//*a -= len;
string = new char[len+1];
while (*a)
{
*string = *a;
string++;
a++;
}
*string = '\0';
string -= len;
}

// ~strings() //Destructor freeing memory
// {delete []string;}

void getdata() //When the entry is going to be taken from user
{
delete [] string;
char *a;
cout << endl << endl <<"Enter the string to be operated upon (Maxlength = 100): ";
cin.getline (a,100);
len = str_len(a);
//while (*a)
// len++;
//a -= len;
string = new char[len+1];
while (*a)
{
*string = *a;
string ++;
a++;
}
*string = '\0';
string -= len;
}
void displaydata() //Displaying data to the user
{
cout << endl << endl << "Your string is : " << string;
}

//Function Declarations which will operate on the string
void strcpy(strings &);
};

void strings::strcpy (strings &source)
{
delete []string;
string = new char[source.len+1];

while (*source.string)
{
*string = *source.string;
string ++;
source.string++;
}
*string = '\0';
string -= len;
}

int str_len (const char *a)
{
int len = 0;
while (*a)
{
len++;
a++;
}
return len;
}

void main()
{
clrscr();
char *str;
int choice;
strings main_string;

//Taking entry for the main string
main_string.getdata();

clrscr();

do
{
clrscr();
//Providing menu
cout << "\t\tMenu for the operations on the given string" << endl
<< "1. Change the Main String." << endl
<< "2. Display the string." << endl
<< "3. Count the length of the string." << endl
<< "4. Copy a string into the main string." << endl
<< "0. Exit" << endl;

//Taking choice
cout << endl << "Enter the no. of your choice here : ";
cin >> choice;
cin.ignore();

//Taking actions
switch (choice)
{
case 1:
main_string.getdata();
break;
case 2:
main_string.displaydata();
cin.get();
break;
case 3:
cout << endl << "Length of the string = " << main_string.len;
cin.get();
break;
case 4:
cout << endl <<"Enter a string to be copied (Maxlength = 100) : ";
cin.getline(str,100);
strings temp_string (str);
temp_string.displaydata();
cin.get();
main_string.strcpy(temp_string);
break;
case 0:
cout << endl << "\t\t\t\tThank You";
cin.get();
exit(0);
break;
default :
cout << endl << "\t\t\t\tWrong Entry";
cin.get();
break;
}
getch();
} while (choice != 0);

}


i am also attaching the .cpp file...
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#4
Encrypted Devil

Encrypted Devil

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okkk...
here is my code..
look at the code with ease... :)

//Program implementing a string class and all the related
//operations...

#include "iostream.h"
#include "conio.h"
#include "stdlib.h"


class strings //Class definition
{
	char *string; //for the string data

	public:
		int len;	  //for lenght of string

		strings() //Default constructor
		{*string = NULL;len = 0;}

		strings(char *a) //Parameterized constructor
		{
			len = str_len(a);
			/*while (*a)
				len++;*/
			//*a -= len;
			string = new char[len+1];
			while (*a)
			{
				*string = *a;
				string++;
				a++;
			}
			*string = '\0';
			string -= len;
		}

//		~strings() //Destructor freeing memory
//		{delete []string;}

		void getdata() //When the entry is going to be taken from user
		{
			delete [] string;
			char *a;
			cout << endl << endl <<"Enter the string to be operated upon (Maxlength = 100): ";
			cin.getline (a,100);
			len = str_len(a);
			//while (*a)
			  //	len++;
			//a -= len;
			string = new char[len+1];
			while (*a)
			{
				*string = *a;
				string ++;
				a++;
			}
			*string = '\0';
			string -= len;
		}
		void displaydata() //Displaying data to the user
		{
			cout << endl << endl << "Your string is : " << string;
		}

		//Function Declarations which will operate on the string
		void strcpy(strings &);
};

void strings::strcpy (strings &source)
{
	delete []string;
	string = new char[source.len+1];

	while (*source.string)
	{
		*string = *source.string;
		string ++;
		source.string++;
	}
	*string = '\0';
	string -= len;
}

int str_len (const char *a)
{
	int len = 0;
	while (*a)
	{
		len++;
		a++;
	}
	return len;
}

void main()
{
	clrscr();
	char *str;
	int choice;
	strings main_string;

	//Taking entry for the main string
	main_string.getdata();

	clrscr();

 do
 {
	clrscr();
	//Providing menu
	cout << "\t\tMenu for the operations on the given string" << endl
		<< "1. Change the Main String." << endl
		<< "2. Display the string." << endl
		<< "3. Count the length of the string." << endl
		<< "4. Copy a string into the main string." << endl
		<< "0. Exit" << endl;

	//Taking choice
	cout << endl << "Enter the no. of your choice here : ";
	cin >> choice;
	cin.ignore();

	//Taking actions
	switch (choice)
	{
		case 1:
			main_string.getdata();
		break;
		case 2:
			main_string.displaydata();
			cin.get();
		break;
		case 3:
			cout << endl << "Length of the string = " << main_string.len;
			cin.get();
		break;
		case 4:
			cout << endl <<"Enter a string to be copied (Maxlength = 100) : ";
			cin.getline(str,100);
			strings temp_string (str);
			temp_string.displaydata();
			cin.get();
			main_string.strcpy(temp_string);
		break;
		case 0:
			cout << endl << "\t\t\t\tThank You";
			cin.get();
			exit(0);
		break;
		default :
			cout << endl << "\t\t\t\tWrong Entry";
			cin.get();
		break;
	}
	getch();
 } while (choice != 0);

}

now check out the code...
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