杭州交通信息网小学生的健康教育:请C++编程高手赐教！由于分割问题不方便解答所以干脆把全题写出，请大侠搭救。
来源：百度文库 编辑：杭州交通信息网 时间：2024/05/08 12:26:20
(1)用 函数产生两个正整数,然后输出下列问题:How much is 6 times 7?,然后学生输入答案,程序检查学生的答案.
(2)为了提高学生的学习兴趣,如果正确,则程序随机打印"Very good!","Excellent","Nice Work","Keep up the good work!"
四个评语之一．如果学生答错，则随机打印”Wrong","Try once again","Con`t give up!","No.Keep trying."四个评语之一．
（3）学生输入10个答案后，程序计算其答对率．如果比率不到75％，则程序打印”Please ask your instructor for extra"，然后终止．
（4）让用户输入级别．1级表示只用一位数，2级表示可用两位数等等．
（5）让用户输入要学习的算术类型，1表示加法，2表示减法，3表示乘法，4表示除法，5表示混合运算．
#include <iostream>
#include <cstdlib>
#include <string>
#include <assert.h>
/***************************************
helper类
成员函数
---生成数字
---生成运算符
---生成奖励评语
---告错评语
*****************/
int operation;
int gradte;
int number(0);
int conter; //循环计数器
int anotherconter; //记录回答正确次数
int realresult; //算式结果
int result; //输入结果
int a,b; //随机数字
class helper
{
int digit();
char type(char operate);
char alltype();
static std::string getgood();
static std::string getbad();
};
/*************************
---生成运算符
*************************/
int digit()
{
switch(gradte)
{
case 1:
number = rand()%10;
break;
case 2:
number = rand()%100;
break;
default:
break;
}
return (number);
}
/*****************************
---
*****************************/
static std::string getgood()
{
static std::string print[4] = {"Very good!","Excellent","Nice Work","Keep up the good work!"};
return(print[rand()%4]);
}
static std::string getbad()
{
static std::string price[4] = {"No.Please try again.","Wrong Try once more.","Don`t give up!","No.Keep trying."};
return(price[rand()%4]);
}
char type()
{
char operate[5] = {'=','+','-','*','/'};
switch(operation)
{
case 1:
realresult = a + b;
break;
case 2:
realresult = a - b;
break;
case 3:
realresult = a * b;
break;
case 4:
realresult = a / b;
default:
break;
}
return(operate[operation]);
}
int main()
{
std::cout << "请输入'1'或'2'选择一位数计算或两位数计算: ";
std::cin >> gradte;
std::cout << "选择所要进行的运算.(1:'+')(2:'-')(3:'*')(4:'/')";
std::cin >> operation;
for(conter = 0;conter < 11;conter ++)
{
a = digit();
b = digit();
std::cout << "How much is " << a << type() << b << "?\n";
std::cin >> result;
if(result == realresult)
{
++anotherconter;
std::cout << getgood() << '\n';
}
else
std::cout << getbad() << '\n';
}
if(anotherconter < 7 )
std::cout << "Please ask your instructor for extra. \n";
return(0);
}
不论不类，但可以用。
等会来答