12v.cpp

C/C++程序设计导论（第二版）》程序源文件

// cmath3.cpp  A program to do complex math. Assumes
//  Complex can be treated as any other simple numerical data type.
#include <iostream.h>
#include "complex3.h"
void main ()
{	char choice;
	Complex a, b, c;					// three Complex variables
	cout << "enter a complex number pair: ";
	cin >> a;					// input cmplx into `a'
	cout << "enter a complex number pair: ";
	cin >> b;					// input cmplx into `b'
	cout << "enter choice: (a)dd, (s)ub, (m)ult: ";
	cin >> choice;					// get user's choice
	switch (choice)
	{	case 'a' :			c = a + b;	// add `b' to `a', assign to `c'
					break;
		case 's' :			c = a - b;		// sub `b' from `a'
					break;
		case 'm' :			c = a * b;		// mult `b' to `a'
					break;
		default : 			cout << "entry error";
	}
	cout << c;					// display results.
}