IND4

#pragma hdrstop
#pragma argsused

#ifdef _WIN32
#include <tchar.h>
#else
  typedef char _TCHAR;
  #define _tmain main
#endif

#include <stdio.h>
#include <iostream>
#include <conio.h>
#include <string>
#include <math.h>

using namespace std;



int conwert12DigitIn10Nums(char a)
{
	if (a=='A') {
		return 10;
	}
	if (a=='B') {
		return 11;
	}
	return (a-'0');
}

void addOrSubInColumn(int*n1,int*n2,int * res, int length)
{
	int point=0;
	for (int i = length-1; i >=0; i--) {
		res[i] = (n1[i]+n2[i] + 12+point)%12;   //  cout <<endl<<" res["<<i<<"] "<< res[i];
		point =   (n1[i]+n2[i] + 12+point)/12-1;
	}
}

char conwert10DigitIn12Nums(int a)
{
	if (a==10) {
		return 'A';
	}
	if (a==11) {
		return 'B';
	}
	return char(a+'0');
}

void convertToInt(char*num,int * n, int length)
{
	for (int i = 0; i < length; i++) {
		n[i]=conwert12DigitIn10Nums(num[i]);
		//cout <<endl<<"n["<<i<<"] "<<n[i];
	}
}

void inputNumInBase12(char*Num12)
{
	cin.getline(Num12,19);
	cout << "u've entered "<< Num12<<endl;
}

void convertToChar(int*n,char*n12,int length)
{
	for (int i = 0; i < length; i++) {
		n12[i]= conwert10DigitIn12Nums(n[i]);
	}
}

void minusOne(int*arr,int length)
{
	for (int i = 0; i < length; i++) {
		arr[i]*=-1;
	}
}

char add(int*bigger,char signb,int*lesser,char signl,int*res,int length)
{
	if (((signb=='+')&&(signl=='+'))||((signb=='-')&&(signl=='-')))
	{
		addOrSubInColumn(bigger,lesser,res,length);
		//(signb=='+')? return'+':return'-';
	}
   /*	if  ((signb='-')&&(signb='-'))
	{
		addOrSubInColumn(bigger,lesser,res,length);
		return'-';
	}  */
	else if (((signb=='-')&&(signl=='+'))||((signb=='+')&&(signl=='-')))
	{
		minusOne(lesser, length);
		addOrSubInColumn(bigger,lesser,res,length);
		minusOne(lesser, length);
	}
	if (signb=='+') {
   //	cout <<endl<<endl<< "signb "<< signb <<endl<<endl;
	return'+';
	}
	else {
   //	cout <<endl<<endl<< "signb "<< signb <<endl<<endl;
	return'-';   }
	//(signb=='+')? (signb=='+'):return'-';
}

char sub(int*bigger,char signb,int*lesser,char signl,int*res,int length,bool is_replasement)
{
	if (!is_replasement) {
		if (signl=='+') {
			signl='-';
		}
		else signl='+';
	}
	else {
		if (signb=='+') {
			signb='-';
		}
		else signb='+';
	}
	return add(bigger,signb,lesser,signl,res,length);
}

int _tmain(int argc, _TCHAR* argv[])
{
	cout << "This program adds and substracts two 12-base nums "<<endl;
	cout << "Enter two 12-base nums( they must be lesser or equal to 41A792678515120367), using digits and symbol 'A', 'B',and sign '+' or '-' before the numbers."<<endl;
	char num1[19]={'\0'};
	inputNumInBase12(num1);
	char num2[19]={'\0'};
	inputNumInBase12(num2);
	char sign11=num1[0];
	char sign2=num2[0];
  //	cout <<endl<<endl<< "sign2 "<< sign2 <<endl<<endl;
	num1[0]='0';
	num2[0]='0';
	int addZeros = (strlen(num1)-strlen(num2));
	char*les = addZeros>0?num2:num1;
	int length =  addZeros>0?strlen(num1):strlen(num2);// cout << length;
	for (int i = strlen(les); i >=0; i--)
	{
		les[i+abs(addZeros)]=les[i];
	}
	for (int i=0; i < abs(addZeros); i++) {
		les[i]='0';
	}
	int *n1=new int[length];
	int *n2=new int[length];
	convertToInt(num1,n1, length);
	convertToInt(num2,n2,length);
	//cout << endl<<"n12 "<<n12;
	//cout<<endl<<"num1 "<<num1;
	//cout<<endl<<"num2 "<<num2;
	int compare1to2= strcmp(num1,num2);
	int *bigger;
	int *lesser;
	char signb;
	char signl;
	bool is_replasement;
	if (compare1to2>=0)
	{
		bigger = n1;
		lesser = n2;
		signb= sign11;
		signl = sign2;
		is_replasement=false;
	}
	else{
		bigger = n2;
		lesser = n1;
		signb= sign2;  //cout <<endl<<endl<< "signb "<< signb <<endl<<endl;
		signl = sign11;
		is_replasement=true;
	}
	char*addition = new char[length+1];
	int* addInInt= new int [length];
	addition[length]='\0';
	char signAdd=add(bigger,signb,lesser,signl,addInInt,length);
	//cout <<endl<<compare1to2;
	convertToChar(addInInt,addition,length);
	cout<<endl<<endl<<"(num1) + (num2) = "<<signAdd<<addition;
	char*substraction = new char[length+1];
	int* substractInInt= new int [length];
	substraction[length]='\0';
	char signSub=sub(bigger,signb,lesser,signl,substractInInt,length,is_replasement);
	//cout <<endl<<compare1to2;
	convertToChar(substractInInt,substraction,length);
	cout<<endl<<endl<<"(num1) - (num2) = "<<signSub<<substraction;
	delete []n1;
	delete []n2;
	delete []addition;
	delete []addInInt;
	delete []substraction;
	delete []substractInInt;
	getch();
	return 0;
}