C语言 TC中出现报错：Expression syntax in function main，怎么解决？

Question

#include<stdio.h>
#include<dos.h>
int main()
{
void iowrite(int port1,unsigned long int value);
unsigned long int ioread(int port);
int Config_Add=0xcf8;
int Config_Dat=0xcfc;
int bus=00,dev=00,fun=00,offset=00;
unsigned long int dat;
iowrite(Config_Add,(0x80000000|(bus<<16) |(dev<<11) |(fun<<8) |(offset<<2)));
dat=ioread(Config_Dat);
printf("%x",dat);

void iowrite(int port1,unsigned long int value) /*expression syntax in function main*/
{
_asm{
mov dx,port1
mov eax,value
out dx,eax
}
}
unsigned long int ioread(int port) /*貌似这行也是同样的报错*/
{
_asm{
mov dx,port
in eax,dx
}
}
return 0;
}

程序中已标出来，望各位大神指导，非常感谢！！

Answer 1

#include<stdio.h>
#include<dos.h>
int main()
{
void iowrite(int port1,unsigned long int value);
unsigned long int ioread(int port);
int Config_Add=0xcf8;
int Config_Dat=0xcfc;
int bus=00,dev=00,fun=00,offset=00;
unsigned long int dat;
iowrite(Config_Add,(0x80000000|(bus<<16) |(dev<<11) |(fun<<8) |(offset<<2)));
dat=ioread(Config_Dat);
printf("%x",dat);

return 0; //最后2行移到这里
}

void iowrite(int port1,unsigned long int value) /*expression syntax in function main*/
{
_asm{
mov dx,port1
mov eax,value
out dx,eax
}
}
unsigned long int ioread(int port) /*貌似这行也是同样的报错*/
{
_asm{
mov dx,port
in eax,dx
}
}

追问

貌似还是不对哦~