403.cpp

C++实训教程

/*
	copyright by Feng
	403.CPP
	Demo	array as function's parameter
*/
#include <iostream.h>
float Total(float a[],int num);
const int SIZE = 10;
main()
{
	float * f = new float [SIZE];
	if(!f)
	{
		cout << "动态分配失败\n";
		return 1;
	}
	for (int i=0;i<SIZE;i++)
		f[i]=i+i;  //*(f+i)
	cout <<"Sum = "  << Total( f ,SIZE) <<endl;
	//调用时，数组用数组名  	  ↑ */
	cout << "Average = " << Total(f,SIZE)/SIZE;
	delete []f;
	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float * a	*/
float Total(float a[],int num)
{
	int i;
	float sum = 0;
	for (i=0; i<num ; i++)
		sum += a[i];
	return sum;
}
/*
Sum = 90
Average = 9
*/