/* Example 017 2009.6.4 Call by Reference II */

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <bios.h>

int I, J;
int P1, P2;
int SL;
char CA[10],CB[10],CC[10];
char TP;
float DB,DC,DT;

void InitVar(void);
void NumberInput(int);

main(void)
{
	clrscr();
	NumberInput(1);

	if ((TP=='+')||(TP=='-')||(TP=='*')||(TP=='/')) {
	switch(TP)
	case '+' : SL = 1; break;
	case '-' : SL = 2; break;
	case '*' : SL = 3; break;
	case '/' : SL = 4; break;
	}

	goto AA12;

AA12:	gotoxy(1,3); printf("Inputed=%9.3f",DB);
	gotoxy(1,4); printf("	SL  =%1d",SL);

//2nd Numner
	NumberInput(2);
	if ((TP== '=')||(TP==0x0D))	goto AA22;

AA22:
	switch(SL) {
	case 1: DT = DB + DC;
		gotoxy(1,10);
		printf("%9.3f = %9.3f + %9.3f",DT,DB,DC);
		break;
		switch(SL) {
	case 2: DT = DB - DC;
		gotoxy(1,10);
		printf("%9.3f = %9.3f - %9.3f",DT,DB,DC);
		break;	switch(SL) {
	case 3: DT = DB * DC;
		gotoxy(1,10);
		printf("%9.3f = %9.3f * %9.3f",DT,DB,DC);
		break;	switch(SL) {
	case 4: DT = DB / DC;
		gotoxy(1,10);
		printf("%9.3f = %9.3f / %9.3f",DT,DB,DC);
		break;
	}

gotoxy(40,1); printf("Bye~!");
getch();
	return(0);

}

void InitVar(void)
	{
	   P1 = 0
	   P2 = 0
	   for (I - 0; I <= 10; I++) {
		CA[I] = 0x0D;
		CB[I] = 0x0D;
		}
	   I = 0;
	}

	void NumberInput(int Px)
		{

N11:
	gotoxy(1,(Px-1)*1; TP = getch();
	if ((TP >= '0')&&(TP <= '9')) {
	CA[I] = TP;
	I++;
	gotoxy(10,((Px-1)*1)+2); printf("%s",CA);
	goto N11;
	}

	if (((TP == '.')&&(P1 == 0))||((TP == '.')&&(P2 == 0))) {
		CA[I] = TP;
		I++;
		switch(Px) {
		case 1: P1 = 1; break;
		case 2: P2 = 2; break;
		}
	gotoxy(10,(Px-1)*5+2); printf("%s",CA);
	goto N11;
	}

for (J = 0; J < I; J++) CB[J] = CA[J];

switch(Px) {
	case 1: DB = atof(CB); break;
	case 2: DC = atof(CB); break;
	}
	gotoxy(1,(Px-1)*5+8); printf("Inputed=%9.3f",DC);
}