C语言 指针连接两个字符串(一)

#include "stdio.h"
int main(int argc,char *argv[])
{
char *mystr(char *s1,char *s2);
char s1[80],s2[80];
gets(s1);
gets(s2);
puts(mystr(s1,s2));
return 0;
}


char *mystr(char *s1,char *s2)
{
int i=0,j=0;
while(s1[i]!='\0')
i++;
while((s1[i++]=s2[j++])!='\0')
return s1;
}