1.1具体任务
1.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
2.运算符为 +, −, ×, ÷
3.并且要求能处理用户的输入，并判断对错，打分统计正确率。
4.要求能处理用户输入的真分数， 如 1/2, 5/12 等
5.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
源代码：
···C
int maxNum(int i, int j) //最大公约数
{
int k;
if ((k = i % j) != 0)
{
maxNum(j, k);
}
else
return j;
}
int main()
{
int n, c, a = 0;
srand(time(NULL));
cin >> n;
for (int i = 0; i < n; i++)
{
int x1, x2, z, t, y1, y2, c, r1, r2;
char r3[10], r4[10];
srand(time(NULL));
memset(r3, 0, sizeof(r3));
memset(r4, 0, sizeof(r4));
x1 = rand() % 100;
x2 = rand() % 100;
z = rand() % 4;
r1 = 0;
r2 = 0;
switch (z)
{
case 0:
cout << x1 << "+" << x2 << "=";
cin >> r1;
r2 = x1 + x2;
if (r1 == r2)
{
cout << " 正" << endl;
a = a + 1;
}
else cout << " 误" << endl;
break;
case 1:
if (x1 < x2)
{
t = x1;
x1 = x2;
x2 = t;
}
else;
cout << x1 << "-" << x2 << "=";
cin >> r1;
r2 = x1 - x2;
if (r1 == r2)
{
cout << " 正" << endl;
a = a + 1;
}
else cout << " 误" << endl;
break;
case 2:
cout << x1 << "*" << x2 << "=";
cin >> r1;
r2 = x1 * x2;
if (r1 == r2)
{
cout << " 正" << endl;
a = a + 1;
}
else cout << " 误" << endl;
break;
case 3:
if (x2 != 0)
{
cout << x1 << "÷" << x2 << "=";
c = maxNum(x1, x2);
y1 = x1 / c;
y2 = x2 / c;
if (n != 1)
{
sprintf_s(r3, "%d/%d", y1, y2);
cin >> r4;
if (strcmp(r3, r4) == 0)
{
cout << " 正" << endl;
a = a + 1;
}
else cout << " 误" << endl;
}
else
{
cin >> r2;
if (r2 == y1)
{
cout << " 正" << endl;
a = a + 1;
}
else cout << " 误" << endl;
}
}
else
{
cout << x1 << "÷" << "1" << "=";
cin >> r2;
if (r2 == x1)
{
cout << " " << "T" << endl;
a = a + 1;
}
else cout << " " << "F" << endl;
}
break;
}
}
cout << "对的数量:" << a;
return 0;
}
···
| PSP2.1 | Personal Software Process Stages | Time (%) Senior Student(/hour) | Time (%)(/hour) |
| · Planning | 计划 | 3h | 1.5h |
| · Estimate | 估计这个任务需要多少时间 | 1h | 50m |
| · Analysis | 需求分析 (包括学习新技术) | 1h | 1h |
| · Coding Standard | 代码规范 | 3h | 2h |
| · Design | 具体设计 | 4h | 2h |
| · Coding | 具体编码 | 30h | 45h |
| · Test | 测试（自我测试，修改代码，提交修改） | 2h | 1.5h |
| Reporting | 报告 | 3h | 2.5h |