四则运算3
设计思路：
使用函数将四则运算封装成四类，分别是jiajian00（），jiajian01（），chengchu00（），chengchu01（）.
在主函数中调用函数fushuyushu0（）来实现加减法有无负数和除法有无余数的控制；
在jiajian00（），jiajian01（），chengchu00（），chengchu01（）函数中分别实现生成运算数，输出题目，计算结果并判断客户输入答案的正误。
本程序实现了整数的加减乘除运算功能，并可控制有无负数，有无余数，运算数的取值范围，以及判断正误和统计正确题目数量的功能。
实验代码：
#include<iostream>
#include<ctime>
#include<vector>
using namespace std;
int zq=0;
void chengchu00(int min, int max)//整数无余数
{
int c1, c2, k,z,x;
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
k = rand() % 2;
if (k == 0)//---------------------------------乘法部分
{
cout << c1 << "*" << c2 << "=" << endl;
x = c1*c2;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl;
}
else//------------------------------除法部分
{
for (;;)
{
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
int c3 = c1*c2;
do
{
c3 = c3 - c1;
} while (c3 > max);
if ((c3 < max) && (c1 != 0))
{
cout << c3 << "/" << c1 << "=" << endl;
x = c3/c1;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl; break;
}
}
}
}
void chengchu01(int min, int max)//整数有余数
{
int c1, c2, k;
float x,z;
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
k = rand() % 2;
if (k == 0)//---------------------------------乘法部分
{
cout << c1 << "*" << c2 << "=" << endl;
x = c1*c2;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl;
}
else//------------------------------除法部分
{
for (;;)
{
c1 = rand() % (max - min) + min + 1;
if (c1 == 0)
{
c2 = rand() % (max - min) + min + 1;
if (c2 != 0)
{
cout << c1 << "/" << c2 << "=" << endl;
x =(float) c1 / c2;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << "(" <<c1<<"/"<<c2<<")"<<endl; break;
}
}
else
{
c2 = rand() % c1;
if (c2 != 0)
{
cout << c1 << "/" << c2 << "=" << endl;
x = c1 / c2;
int y = c1%c2;
cout << "请输入你的答案：" << endl;
int m;
cin >> z>>m;
if ((z == x)&&(y==m))
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << "(" << c1 << "/" << c2 << ")" << endl; break;
}
}
}
}
}
void jiajian00(int min, int max)//整数无负数
{
int c1, c2, k,x,z;
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
k = rand() % 2;
if (k == 0)//---------------------------------加法部分
{
cout << c1 << "+" << c2 << "=" << endl;
x = c1 + c2;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl;
}
else//------------------------------减法部分
{
if (c1>c2)
{
cout << c1 << "-" << c2 << "=" << endl;
x = c1 - c2;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl;
}
else
{
cout << c2 << "-" << c1 << "=" << endl;
x = c2 - c1;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl;
}
}
}
void jiajian01(int min, int max)//整数有负数
{
int c1, c2, k,x,z;
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
k = rand() % 2;
if (k == 0)//---------------------------------加法部分
{
cout << c1 << "+" << c2 << "=" << endl;
x = c1+ c2;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl;
}
else//------------------------------减法部分
{
cout << c1 << "-" << c2 << "=" << endl;
x = c1 - c2;
cout << "请输入你的答案：" << endl;
cin >> z;
if (z == x)
{
cout << "正确" << endl;
++zq;
}
else
cout << "错误，正确答案是：" << x << endl;
}
}
void fushuyushu0(int a,int b, int min, int max)//整数运算
{
if ((a == 1) && (b == 1))
{
int k = rand() % 2;
if (k == 0)
{
chengchu01(min, max);
}
else
jiajian01(min, max);
}
if ((a == 0) && (b == 0))
{
int k = rand() % 2;
if (k == 0)
{
chengchu00(min, max);
}
else
jiajian00(min, max);
}
if ((a == 0) && (b == 1))
{
int k = rand() % 2;
if (k == 0)
{
chengchu01(min, max);
}
else
jiajian00(min, max);
}
if ((a == 1) && (b == 0))
{
int k = rand() % 2;
if (k == 0)
{
chengchu00(min, max);
}
else
jiajian01(min, max);
}
}
void chengchu10(int min, int max)//真分数无余数
{
int c1, c2, c3, c4, k;
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
c3 = rand() % (max - min) + min + 1;
c4 = rand() % (max - min) + min + 1;
k = rand() % 2;
if (k == 0)//---------------------------------乘法部分
cout << "cuowu";
else//------------------------------除法部分
{
cout << "cuowu";
}
}
void jiajian10(int min, int max)//真分数无负数
{
int c1, c2, k;
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
k = rand() % 2;
if (k == 0)//---------------------------------加法部分
{
cout << c1 << "+" << c2 << "=" << endl;
}
else//------------------------------减法部分
{
if (c1>c2)
{
cout << c1 << "-" << c2 << "=" << endl;
}
else
cout << c2 << "-" << c1 << "=" << endl;
}
}
void jiajian11(int min, int max)//真分数有负数
{
int c1, c2, k;
c1 = rand() % (max - min) + min + 1;
c2 = rand() % (max - min) + min + 1;
k = rand() % 2;
if (k == 0)//---------------------------------加法部分
{
cout << c1 << "+" << c2 << "=" << endl;
}
else//------------------------------减法部分
{
cout << c1 << "-" << c2 << "=" << endl;
}
}
void fushuyushu1(int a, int b, int min, int max)//真分数运算
{
if (a == 1)
{
int k = rand() % 2;
if (k == 0)
chengchu10(min, max);
else
jiajian11(min, max);
}
if (a == 0)
{
int k = rand() % 2;
if (k == 0)
chengchu10(min, max);
else
jiajian10(min, max);
}
}
int main()
{
int a, b, c, min, max,N;
cout << "请输入出题数目：" << endl;
cin >> N;
cout << "减法是否有负数：（0否；1是）" << endl;
cin >> a;
cout << "除法是否有余数：（0否；1是）" << endl;
cin >> b;
cout << "请分别输入下限和上限" << endl;
cin >> min >> max;
for (int i = 0; i < N; i++)
{
fushuyushu0(a, b, min, max);
}
cout << "共答对" << zq << "道题" << endl;
/*cout << "整数运算输入0，真分数运算输入1" << endl;
cin >> c;
if (c == 0)
{
cout << "减法是否有负数：（0否；1是）" << endl;
cin >> a;
cout << "除法是否有余数：（0否；1是）" << endl;
cin >> b;
cout << "请分别输入下限和上限" << endl;
cin >> min >> max;
for (int i = 0; i < 100; i++)
{
fushuyushu0(a, b, min, max);
}
}
else
{
for (int i = 0; i < 100; i++)
{
cout << "减法是否有负数：（0否；1是）" << endl;
cin >> a;
fushuyushu1(a,b,min, max);
}
}*/
return 0;
}
实验截图：
分为三种情况，程序正常。
减法无负数，除法有余数：
减法无负数，除法无余数：
减法有负数，除法无余数：
实验总结：
通过本次实验的结对开发，在实践中检验了”做中学“，结对开发，表达自己，互相交流。结对开发给我很大的思考空间，给予很大的鼓励，发挥了古语中所谓“三个臭皮匠”作用，相互讨论，相互批评改正，相互交换思路，写出较为合理的程序。我觉得很有意义。
组员：
张家军
徐少凯 博客地址： http://www.cnblogs.com/3712k/
posted on 2016-03-19 22:56 gaga123456 阅读(160) 评论(1) 编辑 收藏 举报
