410a.cpp

C++实训教程

/*
	410.CPP Output more then 1 parameter
	Statistic
*/
#include <iostream.h>
Statistic(double a[],int num,double& rmax,double & rmin,double & rmean,double & rsum);
const int SIZE = 10;
main()
{
	double max,min,mean,sum;	 
	double f[SIZE] = { 1.1, 2.2, 3.3, 4.4, 5.5,6.6, 7.7, 8.8, 9.9, 11 };
	if (Statistic( f ,SIZE,max,min,mean,sum))
	{	cerr << "size of array is error";
		return 1;}

	cout <<"Sum = "  << sum <<endl;
	cout << "Average = " << mean<<endl;
	cout << "Max = " << max<<endl;
	cout << "Min = " << min<<endl;

	if (Statistic( f ,-1,max,min,mean,sum))
	{	cerr << "size of array is error";
		return 1;}
	
	
	return 0 ;
}
/* 定义函数：	 ↓用数组名作为参数，也可以这样说明参数类型double * a	*/
Statistic(double a[],int num,double& rmax,double & rmin,double & rmean,double & rsum)
{
	int i;
	rmax=a[0],rmin=a[0];
	double sum = 0;
	if (num<1)
		return -1;
	else
	{
		for (i=0; i<num ; i++)
		{
			sum += a[i];
			if (a[i]>rmax)rmax=a[i];
			if (a[i]<rmin)rmin=a[i];
		}
		rsum=sum;
		rmean=sum/num;
		return 0;
	}
}
/*
Sum = 60.5
Average = 6.05
Max = 11
Min = 1.1
size of array is error


*/