[C++知识库]7.9.b-PointersOnC-20220203

#include<stdio.h>
#include<stdarg.h>
float average(int n,...);
int main(){
	printf("%lf\n",average(4,2,3,4,5));
return 0;}
//
float average(int n,...){
	va_list var_arg;
	float sum=0;
	va_start(var_arg,n);
	for(int i=0;i<n;sum+=va_arg(var_arg,int),i++);
	va_end(var_arg);
	return sum/n;
}