动态参数函数

#include<stdio.h>
#include <stdarg.h>
#include <iostream>
using namespace std;

#define bufsize 80
char buffer[bufsize];

int vspf(char *fmt, ...)
{
	va_list argptr;
	int cnt;
	va_start(argptr, fmt);
	cnt = vsnprintf(buffer,bufsize ,fmt, argptr);
	va_end(argptr);
	return(cnt);
}

int main(void)
{
	int inumber = 30;
	float fnumber = 90.0;
	char string[4] = "abc";
	cout<<vspf("%d %f %s", inumber, fnumber, string)<<endl;
	printf("%s\n", buffer);
	getchar();
	return 0;
}