完整串

#include<stdlib.h>
#define max 255
typedef char sstring[max+1];
void initstring(sstring s1,char *ch)
{
	int i=0;
	char *p1=s1,*p2=ch;
	while(*p2!='\0')
	{
		i++;
		*(++p1)=*p2++;
	}
	p1++;
	*p1='\0';
	s1[0]=i;
}
concat(char *s1,char *s2)
{ 
	char *p1=s1+1,*p2=s2+1;
	s1[0]=s1[0]+s2[0];
	while(*p1)	 
		p1++; 
	while(*p1++=*p2++); 	 
	return *s1; 	 
} 
void main()
{
	sstring s1,s2;
	initstring(s1,"abcd");
	initstring(s2,"efgh");
	concat(s1,s2);
	cout<<s1+1;
}