stdarg.cpp

格式化输入输出

#include <iostream>
#include <stdarg.h>
#include <string.h>
#include <string>

using namespace std;

void print(const char* s1, ...)
{
	va_list arg_ptr;
	const char* pz = NULL;
	va_start(arg_ptr, s1);
	do
	{
		pz = va_arg(arg_ptr, const char*);
		cout<<pz<<endl;
	}while( NULL != pz );

	va_end(arg_ptr);

}

int main()
{
	string s1 = "zhang";
	string s2 = "yang";
	string s3 = "hua";

	//print(s1.c_str(), s2.c_str(), s3.c_str(), NULL);
	cout<<s1.length()<<endl;
	cout<<strlen(s1.c_str())<<"   data:"<<strlen(s1.data())<<endl;
	cout<<sizeof(s1.c_str())<<"   data:"<<sizeof(s1.data());

}