[C++知识库]C++命令行计算器初学者实践参考脚本

能进行四则运算

能连续多次计算

能识别符号错误

暂不能识别数字错误

暂不能识别加减和乘除的计算顺序

文件下载地址：(4条消息) 幼儿园级四则整数计算器.zip-C/C++文档类资源-CSDN下载

代码如下：

#include <iostream>
using namespace std;

int main()
{
    std::cout << "计算器\n";
	while (1) {
		int numa , numb , numc;
		char fuhao;
		cout << "数字\n";
		(cin >> numa);
		huidao:cout << "符号 需为加减乘除或等号\n";
		(cin >> fuhao);
		if (fuhao == '+') {
			cout << "下一个数字\n";
			(cin >> numb);
			numc = numa + numb ;
			numa = numc;
			goto huidao;
		}
		else if (fuhao == '-') {
			cout << "下一个数字\n";
			(cin >> numb);
			numc = numa - numb;
			numa = numc;
			goto huidao;
		}
		else if (fuhao == '*') {
			cout << "下一个数字\n";
			(cin >> numb);
			numc = numa * numb;
			numa = numc;
			goto huidao;
		}
		else if (fuhao == '/') {
			cout << "下一个数字\n";
			(cin >> numb);
			numc = numa / numb;
			numa = numc;
			goto huidao;
		}
		else if (fuhao == '=') {
			cout << "得数是" << numa << endl ;
		}
		else {
			cout << "傻逼，这都能输错\n";
			goto huidao;
		}
	}
}

注：如使用Visual Studio请在命令行程序项目下编写，空项目好像不会有显示。