基于控制台的四则运算

Coding地址：https://coding.net/u/Julyyun/p/homework/git

一、题目简介

除了整数以外，还要支持真分数的四则运算，真分数的运算，例如：1/6 + 1/8 = 7/24

运算符为 +, −, ×, ÷

并且要求能处理用户的输入，并判断对错，打分统计正确率。

要求能处理用户输入的真分数， 如 1/2, 5/12 等

使用 -n 参数控制生成题目的个数，例如执行下面命令将生成10个题目Myapp.exe -n 10

二、需求分析

编写一段程序，能够输出小学四则运算的题目，并且支持真分数的操作，同时能够对用户输入的答案判定正确与否，给出成绩。

三、功能设计

1用户能自定义此次题目的数量；

2能够输出四则运算题目，并支持真分数的运算；

3能对答案进行判定，并给出正确答案。

四、代码说明

.整数部分

void zhengshu(int m, int a[])
{
for (int p = 0; p<m; p++)
{
int i = (int)rand() % 50;
int j = (int)rand() % 50;
int k = (int)rand() % 100 / 25;
switch (k)
{
case 0:
int o;
cout << i << "+" << j << "=";
a[p] = i + j;
cin >> o;
if ((i + j) == o)
cout << "答案正确" << endl;
else
cout << "答案错误" << endl;
break;
case 1:
int q;
cout << i << "-" << j << "=";
a[p] = i - j;
cin >> q;
if ((i - j) == q)
cout << "答案正确" << endl;
else
cout << "答案错误" << endl;
break;
case 2:
int r;
cout << i << "*" << j << "=";
a[p] = i*j;
cin >> r;
if ((i * j) == r)
cout << "答案正确" << endl;
else
cout << "答案错误" << endl;
break;
case 3:
int s;
a[p] = i / j;
cout << i << "/" << j << "=";
cin >> s;
if ((i / j) == s)
cout << "答案正确" << endl;
else
cout << "答案错误" << endl;
break;
}
}
}

.真分数部分

void fenshu(int m, int a[][2])
{
for (int p = 0; p<m; p++)
{
int ti,tj;
int i = (int)rand() %10;
int j = (int)rand() %10;
while (j == 0 || i >= j)
{
i = (int)rand() %10;
j = (int)rand() %10;
}
int x = (int)rand() %10;
int y = (int)rand() %10;
while (y == 0 || x >= y)
{
x = (int)rand() %10;
y = (int)rand() %10;
}
int k = (int)rand() % 100 / 25;
switch (k)
{
case 0:
cout << "(" << i << "/" << j << ")" << "+" << "(" << x << "/" << y << ")" << "=";
a[p][0] = i*y + x*j;
a[p][1] = j*y;
scanf("%d/%d",&ti,&tj);
if(a[p][0]==ti && a[p][1]==tj){
cout << "答案正确" << endl;
}
else{
cout << "答案错误" << endl;
}
break;
case 1:
cout << "(" << i << "/" << j << ")" << "-" << "(" << x << "/" << y << ")" << "=";
a[p][0] = i*y - x*j;
a[p][1] = j*y;
scanf("%d/%d",&ti,&tj);
if(a[p][0]==ti && a[p][1]==tj){
cout << "答案正确" << endl;
}
else{
cout << "答案错误" << endl;
}
break;
case 2:
cout << "(" << i << "/" << j << ")" << "*" << "(" << x << "/" << y << ")" << "=";
a[p][0] = i*x;
a[p][1] = j*y;
scanf("%d/%d",&ti,&tj);
if(a[p][0]==ti && a[p][1]==tj){
cout << "答案正确" << endl;
}
else{
cout << "答案错误" << endl;
}
break;
case 3:
cout << "(" << i << "/" << j << ")" << "/" << "(" << x << "/" << y << ")" << "=";
a[p][0] = i*y;
a[p][1] = j*x;
scanf("%d/%d",&ti,&tj);
if(a[p][0]==ti && a[p][1]==tj){
cout << "答案正确" << endl;
}
else{
cout << "答案错误" << endl;
}
}
}

五、测试运行





PSP表格

PSP2.1	Personal Software Process Stages	Time (%) Senior Student	Time (%)
Planning	计划	8	6
· Estimate	估计这个任务需要多少时间	150	160
Development	开发	80	70
· Analysis	需求分析 (包括学习新技术)	25	20
· Design Spec	生成设计文档	5	5
· Design Review	设计复审	5	5
· Coding Standard	代码规范	3	3
· Design	具体设计	30	20
· Coding	具体编码	80	100
· Code Review	代码复审	7	5
· Test	测试（自我测试，修改代码，提交修改）	15	20
Reporting	报告	10	15
·	测试报告	3	2
·	计算工作量	2	1
·	并提出过程改进计划	3	3