问候， 雅克。Or evenif (e != NULL){...}which is of course equivalent to (and clearer than)if (e != 0){...}Regards,Jacques. Jacques Labuschagne写道：Jacques Labuschagne wrote:甚至 if（e！= NULL）{ ... } 这当然等于（并且更清晰） if（e！= 0）{ ... } Or even if (e != NULL){ ... } which is of course equivalent to (and clearer than) if (e != 0){ ... } NULL来自某些C包含，并且不是 语言的基本部分。 0是正确的。NULL is from some of the C includes and is not a base part of thelanguage. 0 is correct. 这篇关于不是空的的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！
