could you help with c++ ? (HW)
Hello ..
i know that it bad to ask for help in codding.
but if i help others maybe could help me.
im working on it for allmost 3 weeks and i really need help.
if you with to say to me that :
im bad codder - i know that this allready could you please write what
exactly i did wrong.
RTFM/STFW (My bible/koran/or what ever you call it is Deitl's C++ book)
could you please write what chapter should i read.
I've got this hw asignmet:
build a program that will get two string (unkown size) and make the next
math func between them :
addition.
substraction.
you cannot use math,bignumbers/bigintegers/changing the string onto
integers/real numbers.
you can use complement.
if use a function you should write it.
Yours Truley
Jabka Atu
btw use _VIM_ not Visual @#$%^&
/***************************************************************************
* Hw Assignment 1
*
* Thu Apr 5 19:42:59 2007
* ka Jabka Atu
*
****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <iostream>
#include <assert.h>
#include <string>
using namespace std;
class Very_Large
{
private:
char *local_value;
int length_of_local_value;
char* both_postive(char *);
int truelangth(char *number);
public:
Very_Large();
Very_Large(char *str);
Very_Large(const Very_Large & objname);
~Very_Large();
void setnumber(char *);
char* getnumber();
void print();
char* subtraction(char *);
void histogram();
char* complement(char *);
int check_if_postive(char *);
char* create_array_for_output(char *);
char* addnumber(char *number);
};
Very_Large::Very_Large()
{
local_value = new char[2];
assert(local_value);
local_value[0]='0';
length_of_local_value=2;
}
Very_Large::Very_Large(char *number)
{
local_value = new char [strlen(number)+1];
assert(local_value);
strcpy(local_value,number);
length_of_local_value=strlen(local_value);
}
Very_Large::Very_Large(const Very_Large& sec)
{
strcpy(local_value,sec.local_value);
assert(local_value);
length_of_local_value=strlen(local_value);
}
Very_Large::~Very_Large(){
delete [] local_value;
}
void Very_Large::print(){
cout <<"The number is : "<<local_value<<endl;
}
void Very_Large::setnumber( char *number){
local_value = new char[strlen(number) +1];
assert(local_value);
strcpy(local_value,number);
length_of_local_value=strlen(local_value);
}
char *Very_Large::getnumber(){
return local_value;
}
int Very_Large::check_if_postive(char *number){
if (strlen(number)>0)
{
if (number[0]=='-')
return 0;
if ((number[0]>='0')&&(number[0]<='9'))
{
return 1;
}
if (number[0]=='+')
{
number[0]='0';
return 1;
}
}
if (!strlen(number))
cout<<"Dood your string is 0 length"<<endl;
}
char* Very_Large::create_array_for_output(char *number){
//I will create a new array with one more byte for hold the output.
char *array_that_will_store_array;
int length_of_input_to_func=strlen(number);
//if (local_value[0]=='9') aftre
if (1)
{
if (length_of_local_value> length_of_input_to_func)
{
array_that_will_store_array = new char[length_of_local_value];
assert(array_that_will_store_array);
strcpy(array_that_will_store_array+1,local_value);
}
else
{
array_that_will_store_array = new char[length_of_input_to_func];
assert(array_that_will_store_array);
strcpy(array_that_will_store_array+1,number);
}
array_that_will_store_array[0]='0';
}
if(1==0)
{
if (length_of_local_value> length_of_input_to_func)
{
array_that_will_store_array = new char[length_of_local_value];
assert(array_that_will_store_array);
strcpy(array_that_will_store_array,local_value);
}
else
{
array_that_will_store_array = new char[length_of_input_to_func];
assert(array_that_will_store_array);
strcpy(array_that_will_store_array,number);
}
}
return array_that_will_store_array;
}
char* Very_Large::both_postive(char *number){
/*
Used for subtraction of two postive numbers;
*/
char *result=NULL;
int q=0,i=0;
int length_of_input_to_func=strlen(number);
char *temp;
int length_of_temp=0;
int delta=0;
int biggest_size=(length_of_local_value>length_of_input_to_func)?length_of_local_value:
length_of_input_to_func;
delta=((biggest_size - length_of_local_value)==0)?length_of_local_value-length_of_input_to_func:
length_of_input_to_func-length_of_local_value;
temp=complement(number);
result=addnumber(temp);
if (result[0]=='0')
{
delete [] temp;
temp=new char[strlen(result)-1];
strcpy(temp,result +1 );
delete [] result;
result = temp;
}
return result;
}
int Very_Large::truelangth(char *number){
int i=0;
if (number[0]=='+' || (number[0] == '-'))
return strlen(number) -1;
else
return strlen(number);
}
char* Very_Large::complement(char *number){
//Mashlim
char *result;
char *temp;
int i=0;
int flag=0;
int length_of_local_value =strlen(local_value);
int delta =0;
int length_of_number = strlen(number);
int length_of_result=(length_of_local_value>length_of_number)
?length_of_local_value : length_of_number ;
int smallest_length=(length_of_local_value<length_of_number)
?length_of_local_value : length_of_number ;
/*
20 - 5 =
=20 + 95 = 115
=15
20 - 30 = 20 + 70 = 90
mashlim(90) = 10 add minus.
*/
// 0 1 2 3 4 5 6 7 8 9
char m[11]={'0','9','8','7','6','5','4','3','2','1','0'};
result = new char[length_of_result];
assert(result);
//I need to enlarge the size of the number to local_value
//number : input
//local_value : the value inside the object
for(int i=length_of_number-1;i>-1;i--)
{
result[i+length_of_local_value-length_of_number] = m[number[i]-'0'+flag];
if (result[i+length_of_local_value-length_of_number]!='0')
flag=1;
}
for (i=length_of_result-smallest_length-1;i>-1;i--)
{
result[i]='9';
}
return result;
}
void Very_Large::histogram(){}
char* Very_Large::addnumber(char *number){
char *result= create_array_for_output(number);
int i=0;
int length_of_local_value=strlen(local_value);
int length_of_input_to_func=strlen(number);
int length_of_result=strlen(result);
int b=0;
int carry=0;
int q=0;
int postivite_check_of_local_value=check_if_postive(local_value);
int postivite_check_of_input_to_stream=check_if_postive(number);
if (number[0]=='+')
number[0]='0';
if (local_value[0]=='+')
local_value[0]='0';
//if((check_if_postive(local_value) && check_if_postive(number)))//both postive
if (postivite_check_of_local_value && postivite_check_of_input_to_stream)
{
if ((length_of_local_value - length_of_input_to_func)<=0)
q=length_of_local_value;
else
q=length_of_input_to_func;
for (i=0;i<q;i++)
{
b=local_value[length_of_local_value -1 - i] + number[length_of_input_to_func -1 -i] + carry - 48 * 2;
if ((local_value[length_of_local_value -1 -i]<48)&&(number[length_of_input_to_func -1 -i]>=48))
b= number[length_of_input_to_func -1 -i] + carry -48;
if ((number[length_of_input_to_func -1 -i]<48)&&(local_value[length_of_local_value -1 -i]>=48))
b=local_value[length_of_local_value -1 -i] + carry -48;
carry=0;
if (b>9)
{
result[length_of_result -1 - i] =b -10 + 48;
carry =1;
}
else
result[length_of_result - 1 - i] = b + 48;
}//end of for
if (carry!=0)
result[length_of_result - 1 - i] = result[length_of_result - 1 -i ] + 1;
}//end of first if (both are postive)
if ((!postivite_check_of_local_value) && (!postivite_check_of_input_to_stream))//both negative
{
char *tmp;
tmp=new char[length_of_local_value-1];
assert(tmp);
strcpy(tmp,local_value + 1);
delete [] local_value;
local_value=tmp;
tmp=NULL;
tmp=new char [length_of_input_to_func];
strcpy(tmp,number + 1);
number=tmp;
delete [] result;
tmp = addnumber(number);
result= new char[length_of_result];
result[0]='-';
strcpy(result + 1, tmp);
delete tmp;
}
if (postivite_check_of_local_value && !postivite_check_of_input_to_stream)
//Postive and Negtive
{
result=subtraction(number+1);
}
if (!postivite_check_of_local_value && postivite_check_of_input_to_stream)
{
char *temp;
temp=local_value;
local_value=number;
number=temp;
result = subtraction(number + 1);
return result;
}
return result;
}
char* Very_Large::subtraction(char *number){
char *result=NULL;
char postivite_check_of_input_to_stream=check_if_postive(number);
char postivite_check_of_local_value=check_if_postive(local_value);
/*
There are 4 posible options :
1.both postive
2.both negative the answar is using addnumber
3.the local_value is negetive and the number is negtive
4.the local_value is positive and the number is negative
*/
if (number=="0")
return local_value;
if (!postivite_check_of_input_to_stream && (!postivite_check_of_local_value))//both negative
{
local_value[0]='0';
result=subtraction(number);
assert(result);
if (result[0]=='-')
{
result[0]='+';
return result;
}
if (result[0]=='+')
{
result[0]='-';
return result;
}
if (result[0]=='0')
{
result[0]='-';
return result;
}
}
if (postivite_check_of_input_to_stream && postivite_check_of_local_value)//both postive
{
char *temp;
result=both_postive(number);
int length_of_local_value=strlen(local_value);
int length_of_input_to_func=strlen(number);
int length_of_result=strlen(result);
int biggest_size=(length_of_local_value>length_of_input_to_func)?
length_of_local_value:length_of_input_to_func;
char wich=(length_of_local_value>length_of_input_to_func)? local_value[0]:number[0];
if ((length_of_result==biggest_size))
{
temp=result;
result=NULL;
result=complement(temp);
delete [] temp;
result[0]='-';
}
if ((result[0]>'0'))
{
char *temp;
temp=new char[strlen(result)-1];
strcpy(temp,result +1 );
if (result!=NULL)
{
//hazzerde of leak of memory
//if you are using POSIX system it may couse dobule delliting instead you can use
//result=NULL;
delete [] result;
//will make dobule free
}
result = temp;
}
}//endif
if (postivite_check_of_local_value && !postivite_check_of_input_to_stream)//postive and negative
{
result=addnumber(number+1);
return result;
}
if (!postivite_check_of_local_value && postivite_check_of_input_to_stream)
{
local_value[0]='+';
result=addnumber(number);
result[0]='-';
local_value[0]='-';
}
return result;
}
void menu(){
cout<<"Welcome to SCS (String Calculation System)\n";
cout<<"\n\n";
cout<<"1. Enter first value \n";//(local_value)
cout<<"2. Enter second value \n";//(number)
cout<<"3. Add to strings (Arithmetic)\n";
cout<<"4. subtract the second string from the first\n";
cout<<"5. Print the value inside local_value\n";
cout<<"6. extand the limit of input stram to n\n";
cout<<"q. to exit\n";
}
int main(){
Very_Large a;
char *value_into_class=NULL;
char *number=NULL;
number=new char[256];
int n=256;
char *result=NULL;
char choice='0';
cout<<"please enter your choise\n";
menu();
while((choice!='q')){
choice=getchar();
switch(choice){
case '1':
{
if (value_into_class!=NULL)
delete [] value_into_class;
value_into_class=new char[n];
cout<<"the frase will be :";
cin>>value_into_class;
a.setnumber(value_into_class);
break;
}
case '2':
{
if (number!=NULL)
delete [] number;
number=new char[n];
cout<<"Please enter a phrase";
cin>>number;
break;
}
case '3':
{
cout<<number;
result=a.addnumber(number);
cout<<result<<endl;
delete [] result;
break;
}
case '4':
{
result=a.subtraction(number);
cout<<result<<endl;
delete [] result;
break;
}
case '5':
{
a.print();
}
case '7':
{
a.histogram();
}
case '6':
{
cout<<"the limit will be (more other 256 byte):\n";
cin>>n;
break;
}
}
}
}
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