Question

上面的程序在编译时。编译器说：warning c206:'diplay': missing function-prototype erorr c231:'display

#include<reg51.h>
sbit k0=P1^0;
sbit k1=P1^1;
sbit k2=P1^2;
sbit k3=P1^3;
sbit d0=P1^4;
sbit d1=P1^5;
sbit d2=P1^6;
sbit d3=P1^7;
sbit B0=P3^7;
sbit I0=P2^0;
sbit I1=P2^2;
sbit I2=P2^3;
sbit I3=P2^4;
sbit kz=P3^0;
unsigned char qiangdanum=0x3f;
unsigned char code table[]={0x3f,0x06,0x5d,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char ge=0,shi=0;
unsigned int num=0,time=0;
void dispiay();
void delay(unsigned int);
main()
{
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
IT0=0;
EA=1;ET0=1;
EX0=1;
{while(1)
{display();
if (kz==0)
TR0=1;
if(num==20)
{num=0;
time++;
if (time==60)
time=0;
}
}
}
}
void exter0() interrupt 0
{EA=0;I0=0;
if (k0==0)
{d0=0;qiangdanum=1;B0=0;}
if (k1==0)
{d1=0;qiangdanum=2;B0=0;}
if (k2==0)
{d2=0;qiangdanum=3;B0=0;}
if (k3==0)
{d3=0;qiangdanum=4;B0=0;}
}
void time0() interrupt 1
{num++;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
}
void display(void)
{shi=time/10;
ge=time%10;
P2=0xef;
P0=table[ge];
delay(5);
P2=0xf7;
P0=table[shi];
delay(5);
P2=0xFE;
P0=table[qiangdanum];
delay(5);
}

上面的程序在编译时。编译器说：warning c206:'diplay': missing function-prototype
erorr c231:'display': redefinition
erorr c231:'display': redefinition
怎么回事？怎么修改啊？

Answer 1

警告：display函数没有原型。
错误：dispaly 被重定义。

你改display()函数的实现试试
display(void){} 改成 display(){}