四则运算的代码的改进（三）

题目：在原基础上能够输入答案判断对错，并且输出正确答案与错误答案的数目：

源代码：

#include<iostream>
#include<time.h>
using namespace std;
float suan(float o1, char oc, float o2)
{
	float r;
	switch (oc)
	{
	case '+':
		r = o1 + o2;
		break;
	case '-':
		r = o1 - o2;
		break;
	case '*':
		r = o1 * o2;
		break;
	case '/':
		r = o1 / o2;
		r = int((r + 0.5) * 100) / 100.0;
		break;
	}
	return r;
}
void main()
{
	int i, k, q, j, v, h, l, hl, d = 0, c = 0; //定义几个变量
	float *o1, *o2, *o3, *r1, *r2;
	char *oc1, *oc2;
	char n1, n2;
	int a1, a2;
	char g[4] = { '+', '-', '*', '/' };
	char y[5][5] = {
		' ', '+', '-', '*', '/',
		'+', '=', '=', '<', '<',
		'-', '=', '=', '<', '<',
		'*', '>', '>', '=', '=',
		'/', '>', '>', '=', '=' };
	srand((unsigned)time(NULL)); //本地时间
b:	cout << "请问您想输出多少道题目？" << endl;
	cin >> q;
	cout << "请输入操作数值的最大范围：" << endl;
	cin >> j;
	cout << "请问是否有无乘除法？（Y/N）" << endl;
	cin >> n1;
	cout << "请问是否有无括号？（Y/N）" << endl;
	cin >> n2;
	cout << "请输入每行运算式的个数：" << endl;
	cin >> v;
	cout << "请输入每行运算式之间的间隔：" << endl;
	cin >> a2;
	o1 = new float[q];
	o2 = new float[q];
	o3 = new float[q];
	r1 = new float[q];
	r2 = new float[q];
	oc1 = new char[q];
	oc2 = new char[q];
	cout << "以下为随机选取的题目：" << endl << endl;
	for (i = 1; i <= q; i++)          //定义一个可以改变题目数量的q
	{
		if (n1 == 'Y')
		{

			oc1[i] = g[rand() % 4];
			oc2[i] = g[rand() % 4];
			o1[i] = rand() % j;
			o2[i] = rand() % j;
			o3[i] = rand() % j;
			if (i == 1)              //直接输出第一题
			{
				if (n2 == 'N')       //无括号   
				{
					cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
					for (hl = 1; hl < 5; hl++)
					{
						if (oc1[i] == y[hl][0])
						{
							h = hl;
						}
						if (oc2[i] == y[0][hl])
						{
							l = hl;
						}
					}
					switch (y[h][l])
					{
					case '>':
						r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
						break;
					case '=':
						r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
						break;
					case '<':
						r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
						break;
					}
				}
				else                 //有括号
				{
					if (rand() % 2 == 0)          //括号在前
					{
						if (oc1[i] == '+' || oc1[i] == '-')
						{
							if (oc2[i] == '*' || oc2[i] == '/')
							{
								cout << '(' << o1[i] << oc1[i] << o2[i] << ')' << oc2[i] << o3[i] << "=	";
								r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
							}
							else
							{
								cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
								r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
							}
						}
						if (oc1[i] == '*' || oc1[i] == '/')
						{
							cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
							r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
						}
					}
					else                          //括号在后
					{
						if (oc1[i] == '+' || oc1[i] == '-')
						{
							if (oc2[i] == '+' || oc2[i] == '-')
							{
								cout << o1[i] << oc1[i] << '(' << o2[i] << oc2[i] << o3[i] << ')' << "=	";
								r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
							}
							else
							{
								cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
								r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
							}
						}
						if (oc1[i] == '*' || oc1[i] == '/')
						{
							cout << o1[i] << oc1[i] << '(' << o2[i] << oc2[i] << o3[i] << ')' << "=	";
							r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
						}
					}
				}
			}
			else
			{
				for (k = 0; k < i; k++)                        //避免重复start
				{
					if (o1[k] == o1[i] && o2[k] == o2[i] && o3[k] == o3[i] && oc1[k] == oc1[i] && oc2[k] == oc2[i])
					{
						i--;
						break;
					}
					else
					{
						if (k == i - 1)  //比较到最后一个数时
						{
							//循环输出/*q*/道运算题
							if (n2 == 'N')       //无括号   
							{
								cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
								for (hl = 1; hl < 5; hl++)
								{
									if (oc1[i] == y[hl][0])
									{
										h = hl;
									}
									if (oc2[i] == y[0][hl])
									{
										l = hl;
									}
								}
								switch (y[h][l])
								{
								case '>':
									r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
									break;
								case '=':
									r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
									break;
								case '<':
									r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
									break;
								}
							}
							else                 //有括号
							{
								if (rand() % 2 == 0)          //括号在前
								{
									if (oc1[i] == '+' || oc1[i] == '-')
									{
										if (oc2[i] == '*' || oc2[i] == '/')
										{
											cout << '(' << o1[i] << oc1[i] << o2[i] << ')' << oc2[i] << o3[i] << "=	";
											r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
										}
										else
										{
											cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
											r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
										}
									}
									if (oc1[i] == '*' || oc1[i] == '/')
									{
										cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
										r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
									}
								}
								else                          //括号在后
								{
									if (oc1[i] == '+' || oc1[i] == '-')
									{
										if (oc2[i] == '+' || oc2[i] == '-')
										{
											cout << o1[i] << oc1[i] << '(' << o2[i] << oc2[i] << o3[i] << ')' << "=	";
											r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
										}
										else
										{
											cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
											r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
										}
									}
									if (oc1[i] == '*' || oc1[i] == '/')
									{
										cout << o1[i] << oc1[i] << '(' << o2[i] << oc2[i] << o3[i] << ')' << "=	";
										r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
									}
								}
							}
						}
					}
				}                                              //避免重复end
			}
		}
		else if (n1 == 'N')
		{
			oc1[i] = g[rand() % 2];
			oc2[i] = g[rand() % 2];
			o1[i] = rand() % j;
			o2[i] = rand() % j;
			o3[i] = rand() % j;
			if (i == 1)
			{
				if (n2 == 'N')
				{
					cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
					r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
				}
				else
				{
					if (rand() % 2 == 0)
					{
						cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
						r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
					}
					else
					{
						cout << o1[i] << oc1[i] << '(' << o2[i] << oc2[i] << o3[i] << ')' << "=	";
						r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
					}
				}
			}
			else
			{
				for (k = 0; k < i; k++)                                  //避免重复start
				{
					if (o1[k] == o1[i] && o2[k] == o2[i] && o3[k] == o3[i] && oc1[k] == oc1[i] && oc2[k] == oc2[i])
					{
						i--;
						break;
					}
					else
					{
						if (k == i - 1)  //比较到最后一个数时
						{
							//循环输出/*q*/道运算题
							if (n2 == 'N')
							{
								cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
								r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
							}
							else
							{
								if (rand() % 2 == 0)
								{
									cout << o1[i] << oc1[i] << o2[i] << oc2[i] << o3[i] << "=	";
									r1[i] = suan(suan(o1[i], oc1[i], o2[i]), oc2[i], o3[i]);
								}
								else
								{
									cout << o1[i] << oc1[i] << '(' << o2[i] << oc2[i] << o3[i] << ')' << "=	";
									r1[i] = suan(o1[i], oc1[i], suan(o2[i], oc2[i], o3[i]));
								}
							}
						}
					}
				}                                                         //避免  重复end
			}
		}
		if (i % v == 0)
		{
			for (a1 = 1; a1 <= a2; a1++)
			{
				cout << endl;
			}
		}
	}
	cout << endl << "请输入答案:" << endl;
	for (i = 1; i <= q; i++)
	{
		cin >> r2[i];
	}
	cout << endl << "以下是正确答案:" << endl;
	for (i = 1; i <= q; i++)
	{
		cout << r1[i] << "	";
		if (i % v == 0)
		{
			cout << endl;
		}
	}
	for (i = 1; i <= q; i++)
	{
		if (r1[i] == r2[i])
		{
			d++;
		}
		else
		{
			c++;
		}
	}
	cout << endl << "您答对了" << d << "道题,答错了" << c << "道题!" << endl;
	cout << endl << "请重新测试：" << endl;
	goto b;
}

　截图：

总结：此次实验内容对我有一定难度，因为以前学的不好所以好多函数调用不太懂，是我和同学合作完成，以后一定要多加练习。