A software class work.
实验目的及要求
生成小学算术题
满足如下条件
- 题目避免重复
- 可定制(数量、打印方式)
- 可控制下面参数
- 是否有乘除法
- 整数范围
- 除法有无余数
- 是否支持小数
- 有无括号
- 加法有无负数
- 是否支持分数
- 打印间隔是否可调整
编程伙伴
- 任力 2015110435
代码实现
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#include <bits/stdc++.h>
#include<windows.h>
using namespace std;
string EXP[1000];
int expNumber = 0;
int numberRange = 0;
int numberType = 0;
int oprType = 0;
int colNumber = 0;
int rowHeight = 0;
//生成一定范围内的整数
int digitRand(int n){
return rand()%n;
}
//生成一定范围内的小数
double doubleRand(int n){
int i = digitRand(n);
int d = digitRand(100);
return i*1.0 + d/100.0;
}
//生成加减法
string oprLow(){
string opr[] = {"+", "-"};
return opr[digitRand(2)];
}
//生成加减乘除法
string oprAll(){
string opr[] = {"+", "-", "*", "/"};
return opr[digitRand(4)];
}
//生成分数
string fracRand(int n){
ostringstream os;
int i = digitRand(n);
int d = digitRand(n);
while(d == 0){
d = digitRand(n);
}
os << i << '/' << d;
return os.str();
}
//生成表达式
string createEXP(int numberRange, int numberType, int oprType){
ostringstream os;
int a[3] = {0, 0, 0};
int b[2] = {0,0};
if (numberType == 0) {}
else if(numberType == 1) a[1] = 1;
else a[2] = 2;
if (oprType == 0){
}else{
b[1] = 1;
}
int numberIndex = a[digitRand(3)];
int oprIndex = b[digitRand(2)];
switch (numberIndex){
case 0 :
os << digitRand(numberRange);
break;
case 1:
os << doubleRand(numberRange);
break;
case 2:
os << fracRand(numberRange);
break;
default:
os << 0;
break;
}
switch (oprIndex){
case 0:
os << oprLow();
break;
case 1:
os << oprAll();
break;
default:
os << '+';
break;
}
numberIndex = a[digitRand(3)];
switch (numberIndex){
case 0:
os << digitRand(numberRange);
break;
case 1:
os << doubleRand(numberRange);
break;
case 2:
os << fracRand(numberRange);
break;
default:
os << 0;
break;
}
os << "=";
return os.str();
}
void conT(){
cout << "Please enter the number of EXP to be generated:";
cin >> expNumber;
cout << "Please enter the data range:";
cin >> numberRange;
cout << "Please enter the data type:(0.only integer, 1.integer&decimal, 2.integer&decimal&fraction)";
cin >> numberType;
cout << "Please enter the operation type:(0.only \"+,-\", 1.\"+,-,*,/\")";
cin >> oprType;
cout << "Please enter the number of EXP in each line:";
cin >> colNumber;
cout << "Please enter the number of blank line within two lines:";
cin >> rowHeight;
}
void create(){
for(int i = 0; i < expNumber; i++){
EXP[i] = createEXP(numberRange, numberType, oprType);
}
}
void print()
{
int cnt = 0;
for(int i = 0; i < expNumber; i++){
cout << setw(15) << EXP[i] << " ";
cnt++;
if(cnt == colNumber)
{
cnt = 0;
for(int j = 0; j < rowHeight+1; j++){
cout << "\n";
}
}
}
}
int main(){
srand((unsigned) time(NULL));
conT();
create();
print();
return 0;
}
