请高手帮忙我仿真出来只显示15.这是为什么刚开始用CVAVR好多不懂。请谅解

#include <mega16.h> #include <delay.h> #include <stdio.h>#define uchar unsigned char#define uint unsigned intuchar teml,temh,tem,tt,a,b;flash uchar table[]={'0','1','2','3','4','5','6','7','8','9',};// 1 Wire Bus functions#asm   .equ __w1_port=0x1B ;PORTA   .equ __w1_bit=0#endasm#include <1wire.h>
// DS1820 Temperature Sensor functions#include <ds18b20.h>
// Alphanumeric LCD Module functions#asm   .equ __lcd_port=0x15 ;PORTC#endasm#include <lcd.h>
// Declare your global variables here
void main(void){// Declare your local variables here
// Input/Output Ports initialization// Port A initialization// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T PORTA=0x00;DDRA=0x00;
// Port B initialization// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T PORTB=0x00;DDRB=0x00;
// Port C initialization// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T PORTC=0x00;DDRC=0x00;
// Port D initialization// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T PORTD=0x00;DDRD=0x00;
// Timer/Counter 0 initialization// Clock source: System Clock// Clock value: Timer 0 Stopped// Mode: Normal top=FFh// OC0 output: DisconnectedTCCR0=0x00;TCNT0=0x00;OCR0=0x00;
// Timer/Counter 1 initialization// Clock source: System Clock// Clock value: Timer1 Stopped// Mode: Normal top=FFFFh// OC1A output: Discon.// OC1B output: Discon.// Noise Canceler: Off// Input Capture on Falling Edge// Timer1 Overflow Interrupt: Off// Input Capture Interrupt: Off// Compare A Match Interrupt: Off// Compare B Match Interrupt: OffTCCR1A=0x00;TCCR1B=0x00;TCNT1H=0x00;TCNT1L=0x00;ICR1H=0x00;ICR1L=0x00;OCR1AH=0x00;OCR1AL=0x00;OCR1BH=0x00;OCR1BL=0x00;
// Timer/Counter 2 initialization// Clock source: System Clock// Clock value: Timer2 Stopped// Mode: Normal top=FFh// OC2 output: DisconnectedASSR=0x00;TCCR2=0x00;TCNT2=0x00;OCR2=0x00;
// External Interrupt(s) initialization// INT0: Off// INT1: Off// INT2: OffMCUCR=0x00;MCUCSR=0x00;
// Timer(s)/Counter(s) Interrupt(s) initializationTIMSK=0x00;
// Analog Comparator initialization// Analog Comparator: Off// Analog Comparator Input Capture by Timer/Counter 1: OffACSR=0x80;SFIOR=0x00;
// 1 Wire Bus initialization//w1_init();
// LCD module initializationlcd_init(16);while (1)      {      w1_write(0XCC); //发转换命令      w1_write(0X44); //启动      delay_ms(750);        w1_init();        w1_write(0XCC); //读        w1_write(0XBE);
        teml=w1_read();         temh=w1_read();        delay_ms(750); //延时         tem=temh;        tem=tem*256;        tem|=teml;        tt=tem*0.0625;        tem=tt*10+0.5;
        //tem=ds1820_read_spd(0xbe);         //tem=0x16;         a=tem/100;        b=tem%100/10;                //a=4;b=5;                  lcd_clear();         lcd_gotoxy(6,0 );         lcd_putsf("temp");         lcd_gotoxy(6,1 );              lcd_putchar(table[a]);          lcd_gotoxy(8,1 );         lcd_putchar(table);               };}
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