UC知道'strcpy' is not a member of 'std'
来源：百度知道 编辑：UC知道 时间：2024/06/24 06:10:52
E:\studyc++\stringbad\strngbad.cpp(9) : error C2039: 'strlen' : is not a member of 'std'
程序如下：#include <string.h>
#include "strngbad.h"
using std::cout;
int StringBad::num_strings = 0;
StringBad::StringBad(const char* s)
{
len=std::strlen(s);
str=new char[len+1];
std::strcpy(str,s);
num_strings++;
cout<<num_strings<<": \""<<str<<"\" object created\n";
}
StringBad::StringBad()
{
len=4;
str=new char[4];
std::strcpy(str, "c++");
cout<<num_strings<<": \""<<str<<"\" default object created\n";
}
StringBad::~StringBad ()
{
cout<<"\""<<str<<"\" object deleted, ";
--num_strings;
cout<<num_strings<<"
程序如下：#include <string.h>
#include "strngbad.h"
using std::cout;
int StringBad::num_strings = 0;
StringBad::StringBad(const char* s)
{
len=std::strlen(s);
str=new char[len+1];
std::strcpy(str,s);
num_strings++;
cout<<num_strings<<": \""<<str<<"\" object created\n";
}
StringBad::StringBad()
{
len=4;
str=new char[4];
std::strcpy(str, "c++");
cout<<num_strings<<": \""<<str<<"\" default object created\n";
}
StringBad::~StringBad ()
{
cout<<"\""<<str<<"\" object deleted, ";
--num_strings;
cout<<num_strings<<"
寒,搞错。vc的确有问题。头文件用#include <cstring>
然后直接使用strcpy()就可以了。
BTW：你用的书是C++ Primer Plus? 我也是从这本书起步的。
这是因为C++库和编译器不完善，未能做到将原来的C语言运行库重新包装到std中。VC一般都有这样的问题，你可以试试gcc编译器。
或者：
你要将C风格的函数前面的std::去除了。
将std::strcpy该为strcpy
头文件用#include<string.h>