Курсовой проект / calc

// ---------------------------------------------------------------------------

#pragma hdrstop

#include "struct.cpp"


// ---------------------------------------------------------------------------

#pragma package(smart_init)

class Calc {
public:
	const UnicodeString calc(list<ItemD>input);
};


int GetNum(char s) {
	switch(s) {
	case '0':return 0;
	case '1':return 1;
	case '2':return 2;
	case '3':return 3;
	case '4':return 4;
	case '5':return 5;
	case '6':return 6;
	case '7':return 7;
	case '8':return 8;
	case '9':return 9;
	case 'a':case 'A':return 10;
	case 'b':case 'B':return 11;
	case 'c':case 'C':return 12;
	case 'd':case 'D':return 13;
	case 'e':case 'E':return 14;
	case 'f':case 'F':return 15;
	}
	return 0;
}

char* GetCh(int s) {
	switch(s) {
	case 0:	return "0";
	case 1:	return "1";
	case 2:	return "2";
	case 3:	return "3";
	case 4:	return "4";
	case 5:	return "5";
	case 6:	return "6";
	case 7:	return "7";
	case 8:	return "8";
	case 9:	return "9";
	case 10:return "A";
	case 11:return "B";
	case 12:return "C";
	case 13:return "D";
	case 14:return "E";
	case 15:return "F";
	}
	return "Z";
}

int Get10(UnicodeString s) {
	s.Delete(1, 2);
	int res = 0;
	for (int i = 8, k = 1; i > 0; i--, k *= 16)
		res = res + GetNum(s[i]) * k;
	return res;
}

UnicodeString Get16(int s) {
	UnicodeString res = "";
	for (; s > 0; s = s / 16) res = GetCh(s % 16) + res;
	for (; res.Length() < 8; res = "0" + res);
	res.Delete(1, res.Length() - 8);
	res = "0x"+res;
	return res;
}



UnicodeString sum16(UnicodeString op1, UnicodeString op2) {
	return Get16(Get10(op1)+Get10(op2));
}

UnicodeString razn16(UnicodeString op1, UnicodeString op2) {
	return Get16(Get10(op1)-Get10(op2));
}

UnicodeString proiz16(UnicodeString op1, UnicodeString op2) {
		return Get16(Get10(op1)*Get10(op2));
}

UnicodeString chast16(UnicodeString op1, UnicodeString op2) {
	if (Get10(op2) != 0) return Get16(Get10(op1)/Get10(op2));
	else return  Get16(0);
}

UnicodeString sign16(UnicodeString op1) {
	if (Get10(op1) == 0) return op1;
	else return "0x00000001";
}


const UnicodeString Calc::calc(list<ItemD>input) {
	list<ItemD>::iterator op1;
	list<ItemD>::iterator op2;
	while (true) {
		list<ItemD>::iterator it;
		for (it = input.begin(); (it != input.end()) && ((*it).type != 6); it++ );
		op2 = it;
		for (it = op2; it != input.end(); it++ ) {
			if (((*it).type == 3) || ((*it).type == 4) || ((*it).type == 5)) break;
			lf((*it).type == 6) {	op1 = op2;	op2 = it;	}
		}
		if (it ==  input.end())  break;
		el {
			if ((*it).value == "+") {
				(*op1).value = sum16((*op1).value, (*op2).value);
				(*op1).type = 6;
				(*op2).type = -1;
			}
			lf((*it).value == "-") {
				(*op1).value = razn16((*op1).value, (*op2).value);
				(*op1).type = 6;
				(*op2).type = -1;
			}
			lf ((*it).value == "*") {
				(*op1).value = proiz16((*op1).value, (*op2).value);
				(*op1).type = 6;
				(*op2).type = -1;
			}
			lf((*it).value == "/") {
				(*op1).value = chast16((*op1).value, (*op2).value);
				(*op1).type = 6;
				(*op2).type = -1;
			}
			lf ((*it).value == "sign") {
				(*op2).value = sign16((*op2).value);
				(*op2).type = 6;
			}
			(*it).type = -1;
		}
	}
	return (*op1).value;
}