求C語言高手幫忙解答，問題是：寫壹個函數，將兩個字符串連接．謝謝～～～

main()

{

char s1[100]={'a','b','c','d','e','f','g','\0'};

char s2[100]={'h','i','j','k','\0'};

printf("s1=%s\n",s1);

printf("s2=%s\n",s2);

lj(s1,s2);

getch();

}

lj(char s1[],char s2[])

{

char s3[100];

int i=0,j=0;

while(s1[i]!='\0')

{

s3[i]=s1[i];

i++;

}

while(s2[j]!='\0')

{

s3[i]=s2[j];

i++;j++;

}

i++;

s3[i]='\0';

printf("s3=%s\n",s3);

}