四则运算3

一.要求:

    1.让程序能接受用户输入答案，并判定对错。最后给出总共对/错 的数量。

二.思路: 

   定义变量c1,c2并初始化,每出一道题就答一道题,如果正确c1++,如果错误c2++,再输出c1和c2的值

三.代码: 

#include <iostream>
using namespace std;
#include <math.h>
#include <time.h>
int c1=0;                    //初始化计数正误的个数
int c2=0;
int display1(int z, int x, int y, int i, int num) //有乘除
{
double jieguo;
if (i==0)
{
cout << "(" << z<< ")" << x << " + " << y << " = ";
cin >> jieguo;
if (jieguo==x+y) //判断正误
{
cout << " 回答正确！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c1++;

}
else
{
cout << " 回答错误！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c2++;

}
}

if (i== 1)
{
cout << "(" << z << ")" << x << " - " << y << " = ";
cin >> jieguo;
if (jieguo == x - y)
{
cout << " 回答正确！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c1++;

}
else
{
cout << " 回答错误！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c2++;

}
}
if (i== 2)
{
cout << "(" << z << ")" << x << " x " << y << " = ";
cin >> jieguo;
if (jieguo == x*y)
{
cout << " 回答正确！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c1++;

}
else
{
cout << " 回答错误！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c2++;

}
}
if (i == 3)
{
if (y == 0)
{
do
{
while (y != 0)
{
y = rand() % (num + 1);
}
} while (y == 0);
}
else
{
cout << "(" << z << ")" << x << " / " << y << " = ";
cin >> jieguo;
if (jieguo == x*y)
{
cout << " 回答正确！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c1++;

}
else
{
cout << " 回答错误！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c2++;

}
}
}
}

int display2(int z, int x, int y, int i, int num) //含有加减
{
double jieguo;
if (i == 0)
{
cout << "(" << z<< ")" << x << " + " << y << " = ";
cin >> jieguo;
if (jieguo == x + y)
{
cout << " 回答正确！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c1++;
}
else
{
cout << " 回答错误！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c2++;
}
}
if (i == 1)
{
cout << "(" << z << ")" << x << " + " << y << " = ";
cin >> jieguo;
if (jieguo == x + y)
{
cout << " 回答正确！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c1++;
}
else
{
cout << " 回答错误！" << " 正确题数为:" << c1 << " 错误题数为:" << c2 << endl;
return c2++;
}
}

}
int main()
{
int number; //题的份数
int xuanze; //做判断是否有乘除法
int num; //数值范围
int fushu; //减法结果是否存在负数的情况
int yushu; //表示运算结果有无余数
int geshu; //表示每行打印的运算式的个数
int a[30], b[30], m1[30], m2[30];

srand((unsigned)time(NULL));
cout << endl;
cout << " 四则运算出题系统 " << endl;
cout << endl;
cout << " 请按要求输入控制条件！" << endl;
cout << " 份数（tip：正整数）：";
cin >> number;
cout << endl;
cout << " 数值范围（tip：必须输入一个正整数，如：99表示范围为0~99）：";
cin >> num;
cout << endl;
cout << " 是否有乘除法（tip：必须输入0/1,0表示无，1表示有）： ";
cin >> xuanze;
cout << endl;
cout << " 结果是否有负数（tip：必须输入0/1,0表示无，1表示有）：";
cin >> fushu;
cout << endl;
cout << " 除法结果有无余数（tip：必须输入0/1,0表示无，1表示有0，）：" ;
cin >> yushu;
cout << endl;
for (int k = 1; k <= number; k++)
{
cout << "______________________________________________________________________________" << endl;
cout << endl;
cout << "第" << k << "份题如下：" << endl;
cout << "______________________________________________________________________________" << endl;
cout << endl;
if (xuanze == 1)
{
cout << "_____________________________________________________________________________" << endl;
cout << endl;

cout << "______________________________________________________________________________" << endl;
cout << endl;
for (int i = 1; i <= 30; i++)
{
a[i] = rand() % (num + 1);
b[i] = rand() % (num + 1);
m1[i] = rand() % 4;

for (int j = 1; j <= i - 1; j++)
{
if (a[i] == a[j] && b[i] == b[j] && m1[i] == m1[j])
{
do
{
a[i] = rand() % (num + 1);
b[i] = rand() % (num + 1);
} while (a[i] == a[j] && b[i] == b[j] && m1[i] == m1[j]);
}
}
if ((fushu == 1 && m1[i] == 1) || (yushu == 1 && m1[i] == 3))
{
display1(i, a[i], b[i], m1[i], num);
}
else if (yushu == 0 && m1[i] == 3)
{
if (a[i] % b[i] == 0)
{
display1(i, a[i], b[i], m1[i], num);
}
else
{
do
{
a[i] = rand() % (num + 1);
b[i] = rand() % (num + 1);
while (b[i] == 0)
{
b[i] = rand() % (num + 1);
}
} while (a[i] % b[i] != 0);
display1(i, a[i], b[i], m1[i], num);
}
}
else if (fushu == 0 && m1[i] == 1)
{
if (a[i] >= b[i])
{
display1(i, a[i], b[i], m1[i], num);
}
else
{
do
{
a[i] = rand() % (num + 1);
b[i] = rand() % (num + 1);
} while (a[i]<b[i]);
display1(i, a[i], b[i], m1[i], num);
}
}
else
{
display1(i, a[i], b[i], m1[i], num);
}
if (i%geshu == 0)
{
cout << endl;
}
if (i == 30)
{
cout << endl;
}
}
}
else if (xuanze == 0) //没有乘除法存在，只需要判断有无负数结果产生
{
cout << "___________________________________________________________________" << endl;
cout << endl;

for (int i = 1; i <= 30; i++)
{
a[i] = rand() % (num + 1);
b[i] = rand() % (num + 1);
m2[i] = rand() % 2;

for (int j = 1; j <= i - 1; j++)
{
if (a[i] == a[j] && b[i] == b[j] && m2[i] == m2[j])
{
do
{
a[i] = rand() % (num + 1);
b[i] = rand() % (num + 1);
} while (a[i] == a[j] && b[i] == b[j] && m2[i] == m2[j]);
}
}
if (fushu == 0)
{
if (a[i] >= b[i])
{
display2(i, a[i], b[i], m2[i], num);
}
else
{
do
{
a[i] = rand() % (num + 1);
b[i] = rand() % (num + 1);
} while (a[i]<b[i]);
display2(i, a[i], b[i], m2[i], num);
}
}
else
{
display2(i, a[i], b[i], m2[i], num);
}
if (i%geshu == 0)
{
cout << endl;
}
if (i == 30)
{
cout << endl;
}
}
}
else
{
cout << endl;
cout << " Sorry！ 输入错误，请按要求重输！" << endl;
cout << endl;
cout << endl;
k = k - 1;
}

}
return 0;
}

四.结果截图: 

五.总结: 

经过这次四则运算的实践，让我学到了更多知识，也增强了自己的动

手能力，同时也看到了自身的不足,在这次实践中虽然我只做了其中一

部分，但是体味到了其中的乐趣。我会在以后的学习和生活中努力思

考，善于发现和解决问题，开动脑筋，去发现更多新的东西。

六.PSPO过程文档:

 一.项目计划总结

                    周活动总结表

姓名：孔维春　　　                                    日期：2015.3.22

阶段时间和效率                                            周数（上一次周活动表的周数+1）：

不包括上一周在内的累计时间                                                                         

以前各周的累计时间                                                                                    

                  二、时间记录表：

学生        孔维春                                             日期   2015年3月22日 

教师        王建民                                             课程           PSP       

                        三、缺陷记录日志：

学生     孔维春       

日期     2015年3月22日 

教员       王建民   

程序号      2          

四则运算3

原文：http://www.cnblogs.com/littilsaber/p/4357420.html