C++中常用类型转换

String  转 char*

string str = "hello";

       char* pChar = new char[32];

strcpy(pChar,str.c_str());

Cstring 转 char*

CString cstr="hello";

       string str = cstr.GetBuffer(cstr.GetLength());

string 转 Cstring

    CString cstr;

       string str = "hello";

       cstr.Format("%s",str.c_str());

Cstring 转 string

    CString cstr="hello";

       string str = cstr.GetBuffer(cstr.GetLength());

Const char* 转 char *

    const char* cpc = "hello";

       char * pc = new char[32];

       strcpy(pc,cpc);

char* 转 const char*

    char* pc = "hello";

       const char* cpc;

       cpc = pc;

char * 转 cstring

     char* pc = "hello";

       CString cstr;

      cstr.Format("%s",pc);

char* 转 string

    char* pc = "hello";

       string str(pc);

Cstring 与 int 互相转换

将字符转换为整数，用 atoi, _atoi64  atol

将数字转换为Cstring,用Cstring的format函数

 

char * number = "1234567890123";

LONGLONG num = _atoi64(number);

       CString mum = "12345678901234";

       LONGLONG num = _atoi64(mum);

 

       string mum1 = "123456789012345";

       LONGLONG num = _atoi64(mum1.c_str());

String 转 const char*

string mum1 = "123456789012345";          

       char* pc1 = new char[32];

strcpy(pc1,mum1.c_str());

const  char * cpc1 = NULL;

       cpc1 = pc1;