如何将char数组复制到CString? [英] How to copy char array to CString?

问题描述

我有一个带有一些文本的文件.我想做2个任务
1.打开文件时，在文件末尾添加mac_address.
2.用字母"P"替换字符串中的第一个字符

I have a file with some text. I want to do 2 tasks
1.append the file with mac_address at end of the text when i open it.
2.Replace first char in the string with Letter ''P''

while (readFile.ReadString(strLine))
{

CString s=strLine;
.....
if(s[0]=='L')
{
for(int temp=0;temp<18;temp++)
{

 s[m]=mac_address[temp];//here is the error

}
s[0]=_T('P');// here is the error

}

推荐答案

CString构造函数应完成此任务，即:

CString constructor should do the job, namely:

CString s(mac_address);

请注意，如果您正在执行UNICODE构建，则构造函数会执行将提供的char转换为wide char的必要转换.
[更新]

Beware if you are doing a UNICODE build then the constructor performs the necessary conversion of the provided chars into wide char ones.

[update]

if ( s.Left(1)==_T("L") )
{
  s = _T("P");
  for(int i = 1; i < 18; i++)
  {
    s += mac_address[i];
  }
}

[/update]

使用

Use CString::SetAt(), to change the value at any index.

s[m]=mac_address[temp]; 
//can be written as
if(m>=0 && m<s.getlength())>
{
   s[m]=mac_address[temp];
}

s+=mac_address;

追加到文本的末尾.

appends to the end of the text.

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