字符串占用字节数的求法

1、示例代码：

// Test.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <string.h>
#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	cout << "字符串占用字节数的求法："<< endl;
	cout << "sizeof(int)	 = " << sizeof(int) << endl;
	cout << "sizeof(short)	 = " << sizeof(short) << endl;
	cout << "sizeof(long)     = " << sizeof(long) << endl;
	cout << "sizeof(float)	 = " << sizeof(float) << endl;
	cout << "sizeof(double)	 = " << sizeof(double) << endl;
	cout << "sizeof(bool)	 = " << sizeof(bool) << endl;
	cout << "sizeof(void*)	 = " << sizeof(void*) << endl << endl;

	cout << "sizeof(char)	 = " << sizeof(char) << endl;
	cout << "sizeof(wchar_t)	 = " << sizeof(wchar_t) << endl;
	cout << "sizeof(TCHAR)	 = " << sizeof(TCHAR) << endl << endl;

	cout << "窄字符（Ansi）" << endl;
	char szStr1[] = "Hello World!";
	char *pStr2 = "Hello World!";
	cout << sizeof(szStr1) << endl;
	cout << sizeof(char) * strlen(pStr2) <<endl;

	cout << endl << "宽字节（Unicode）" << endl;
	wchar_t szStr3[] = L"Hello World!";
	wchar_t *pStr4 = L"Hello World!";
	cout << sizeof(szStr3) << endl;
	cout << sizeof(wchar_t) * wcslen(pStr4) <<endl;

	cout << endl << "通用型" << endl;
	TCHAR szStr5[] = _T("Hello World!");
	TCHAR *pStr6 = _T("Hello World!");
	cout << sizeof(szStr5) << endl;
	cout << sizeof(TCHAR) * _tcslen(pStr6) <<endl;


	getchar();
	return 0;
}

2、当项目使用Unicode字符集时，运行结果如下：

3、当项目使用未设置（窄字符）时，运行结果如下：

4、使用多字节字符集时：

最后

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