s_gets(char * st, int n)

{

????char * ret_val;

????char * find;

????ret_val = fgets(st, n, stdin);

????if (ret_val)

????{

????????find = strchr(st, '\n');

?????????if(ret_val)

????????????* find = '\0';

????????else

????????????while (getchar() != '\n')

????????????????contine;?

????}

return ret_val;

}

我想問一下find = strchr（st, '\n'）只是查找了\n ，整個函數并沒有提到字符串的結束標志\0,

else為什么判斷的\0,并將\0之后的所有輸入都丟棄這是怎么實現的呢？