cal.cpp

c++小程序

#include "Cal.h"
#include <iostream>

using namespace std;


void cal(double a, double b,int op)
{
	double r=0;
	switch(op)
	{
		case '1':
			cout << "请输入第一个加数:" << endl;
			cin >> a;
			cout << "请输入第二个加数:" << endl;
			cin >> b;
			r = a + b;
			cout << "计算结果:" << endl;
			cout << r << endl;
			break;

		case '2':
			cout << "请输入被减数:" << endl;
			cin >> a;
			cout << "请输入减数:" << endl;
			cin >> b;
			r = a - b;
			cout << "计算结果:" << endl;
			cout << r << endl;
			break;
		case '3':
			cout << "请输入第一个被乘数:" << endl;
			cin >> a;
			cout << "请输入第二个乘数:" << endl;
			cin >> b;
			r = a * b;
			cout << "计算结果:" << endl;
			cout << r << endl;
			break;

		case '4':
			cout << "请输入被除数:" << endl;
			cin >> a;
			cout << "请输入除数:" << endl;
			cin >> b;
			r = a / b;
			cout << "计算结果:" << endl;
			cout << r << endl;
			break;
	}	
}


void displayStartScreen()
{
	cout << endl;
	cout << "     我的计算器 版本1.0" << endl;
	cout << "      1. 加法运算" << endl;
	cout << "      2. 减法运算" << endl;
	cout << "      3. 乘法运算" << endl;
	cout << "      4. 除法运算" << endl;
	cout << endl;

	cout << "请选择计算的类型,只要输入运算类型前的序号!" << endl;


}