在C下通过引用传递指针参数?

Passing pointer argument by reference under C?(在C下通过引用传递指针参数?)
本文介绍了在C下通过引用传递指针参数?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

问题描述

#include <stdio.h>
#include <stdlib.h>

void
getstr(char *&retstr)
{
 char *tmp = (char *)malloc(25);
 strcpy(tmp, "hello,world");
 retstr = tmp;
}

int
main(void)
{
 char *retstr;

 getstr(retstr);
 printf("%s
", retstr);

 return 0;
}

gcc 不会编译这个文件,但是在添加 #include <cstring> 之后我可以使用 g++ 来编译这个源文件.

gcc would not compile this file, but after adding #include <cstring> I could use g++ to compile this source file.

问题是:C语言是否支持通过引用传递指针参数?如果没有,为什么?

The problem is: does the C programming language support passing pointer argument by reference? If not, why?

谢谢.

推荐答案

不,C 不支持引用.这是设计使然.您可以在 C 中使用指向指针的指针代替引用.引用仅在 C++ 语言中可用.

No, C doesn't support references. It is by design. Instead of references you could use pointer to pointer in C. References are available only in C++ language.

这篇关于在C下通过引用传递指针参数?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跟版网!

本站部分内容来源互联网,如果有图片或者内容侵犯了您的权益,请联系我们,我们会在确认后第一时间进行删除!

相关文档推荐

Could I ever want to access the address zero?(我可以想访问地址零吗?)
C++ Access derived class member from base class pointer(C++ 从基类指针访问派生类成员)
Weird Behaviour with const_cast(const_cast 的奇怪行为)
Are pointer variables just integers with some operators or are they quot;symbolicquot;?(指针变量只是带有某些运算符的整数还是“符号?)
Modifying a char *const string(修改 char *const 字符串)
Modifying a const int in C++(修改 C++ 中的 const int)