else i s->str=(char )malloc((len+1)*sizeof(char)); ∥分配空间 if (s->str) return ERRORS s->str(Olen =string constant(Olen 对应的字符赋值 s->length=len 赋予字符串长度 return oK 请单鼠标左键换页!else { s->str=(char*)malloc((len+1)*sizeof(char)); //分配空间 if (!s->str) return ERROR; s->str[0..len]=string_constant[0..len]; //对应的字符赋值 s->length=len; //赋予字符串长度 } return OK; }