芜湖

| 这个作业属于哪个班级 | C语言--网络2011/2012 |
| ---- | ---- | ---- |
| 这个作业的地址 | C博客作业03--函数 |
| 这个作业的目标 | 学习循环结构内容，包括for循环、while循环、循环嵌套 |
| 姓名 | 杨振鹏 |

1.本章学习总结

1.1 函数定义，调用，声明

函数类型 函数名（参数）
e.g.int giao（int emmm）；

1.2 全局，局部变量，静态局部变量

• 全局变量：在所有函数外定义的变量，它的作用域默认是整个程序。
• 局部变量：在函数内定义的变量，它的作用域只在该函数中。
• 静态局部变量：该变量会在一次调用函数时，继承上一次调用函数后的值
  e.g. static int giao；

1.3 c数据类型及注意点

• 整型：short<int<long<long long
• 浮点型：float<double
• 字符型：char
• 浮点误差处理：后+0.00001

1.4 c运算符

1.综合作业

2.1 模块流程图

• 一年级
  

• 二年级
  

• 三年级
  

2.2 函数功能及全局变量

2.2.1 全局变量

无

2.2.2 菜单相关函数

void OperateMenu();//游戏操作界面
void GradeOneMenu();//一年级菜单
void GradeTwoMenu();//二年级菜单
void GradeThreeMenu();//三年级菜单

void GradeOneMenu()//一年级
{

	while (1)
	{
		system("cls");
		printf("*********************一年级小朋友好！********************************\n");
		printf("小兔崽子，你想做多少题呀？输入你要做的题数啊！\n");
		printf("你要是怕了就输入n退回主菜单。\n");
		printf("***************************************************************\n");

		printf("输入题数(怕了输n)：\n");
		char ch;
		int TitleNumber, i, temp;
		int Right = 0;
		int Number1, Number2, symbol, RightAnswer, YourAnswer;
		double accuracy;
		srand(time(0));
		scanf("\n%c", &ch);
		if (ch == 'n')
		{
			Sleep(500);
			OperateMenu();
			return;
		}
		else//选择答题
		{

			TitleNumber = ch - '0';
			for (i = 0; i < TitleNumber; i++)
			{
				Number1 = RandNumber(10);
				Number2 = RandNumber(10);
				symbol = RandSymbol(1);
				if (symbol == '-')
				{
					if (Number1 < Number2)
					{
						temp = Number1; Number1 = Number2; Number2 = temp;
					}
				}
				printf("%d %c %d = ?\n", Number1, symbol, Number2);
				printf("来吧宝贝输入你的答案：\n");
				scanf("%d", &YourAnswer);
				switch (symbol)
				{
				case '+':RightAnswer = Number1 + Number2; break;
				case '-':RightAnswer = Number1 - Number2; break;
				case '*':RightAnswer = Number1 * Number2; break;
				case '/':RightAnswer = Number1 / Number2; break;
				}
				if (YourAnswer == RightAnswer) {
					Right++; printf("强啊!\n");
				}
				else { printf("菜鸡，正确答案：%d\n", RightAnswer); }
				printf("觉得太菜不想做了就输n，不然就输y继续\n");
				scanf("\n%c", &ch);
				if (ch == 'n')
				{
					Sleep(500);
					GradeOneMenu();
				}

			}
			accuracy = (double(Right) / TitleNumber) * 100;
			if (accuracy < 60)printf("小老弟你不行啊，正确率:%.0f%", accuracy);
			else printf("可以啊小老弟，正确率:%.0f%c", accuracy, '%');
			printf("还要再来吗？\n");
			printf("请输入y/n：");
			scanf("\n%c", &ch);
			if (ch == 'n')
			{
				system("cls");
				Sleep(500);
				OperateMenu();
				return;
			}
			else
			{
				system("cls");
				Sleep(500);
				GradeOneMenu();
				return;
			}
		}
	}

}

void GradeTwoMenu()//二年级
{

	while (1)
	{
		system("cls");
		printf("*********************二年级小朋友好！********************************\n");
		printf("小兔崽子，你想做多少题呀？输入你要做的题数啊！\n");
		printf("你要是怕了就输入n退回主菜单。\n");
		printf("***************************************************************\n");
		printf("输入题数(怕了输n)：\n");
		char ch;
		int TitleNumber, i, temp;
		int Right = 0;
		int Number1, Number2, symbol, RightAnswer, YourAnswer;
		double accuracy;
		srand(time(0));
		scanf("\n%c", &ch);
		if (ch == 'n')
		{
			Sleep(500);
			OperateMenu();
			return;
		}
		else//选择答题
		{

			TitleNumber = ch - '0';
			for (i = 0; i < TitleNumber; i++)
			{
				Number1 = RandNumber(20);
				Number2 = RandNumber(20);
				symbol = RandSymbol(2);
				if (symbol == '-')
				{
					if (Number1 < Number2)
					{
						temp = Number1; Number1 = Number2; Number2 = temp;
					}
				}
				if (symbol == '/')
				{
					Number2= RandNumber(5);
					Number1 = Number2 * (rand()%10+1);
				}
				if (symbol == '*')
				{
					Number1 /= 2;
					Number2 /= 2;
				}
				printf("%d %c %d = ?\n", Number1, symbol, Number2);
				printf("来吧宝贝输入你的答案：\n");
				scanf("%d", &YourAnswer);
				switch (symbol)
				{
				case '+':RightAnswer = Number1 + Number2; break;
				case '-':RightAnswer = Number1 - Number2; break;
				case '*':RightAnswer = Number1 * Number2; break;
				case '/':RightAnswer = Number1 / Number2; break;
				}
				if (YourAnswer == RightAnswer) {
					Right++; printf("强啊!\n");
				}
				else { printf("菜鸡，正确答案：%d\n", RightAnswer); }
				printf("觉得太菜不想做了就输n，不然就输y继续\n");
				scanf("\n%c", &ch);
				if (ch == 'n')
				{
					Sleep(500);
					GradeTwoMenu();
				}

			}
			accuracy = (double(Right) / TitleNumber) * 100;
			if (accuracy < 60)printf("小老弟你不行啊，正确率:%.0f%", accuracy);
			else printf("可以啊小老弟，正确率:%.0f%c", accuracy, '%');
			printf("还要再来吗？\n");
			printf("请输入y/n：");
			scanf("\n%c", &ch);
			if (ch == 'n')
			{
				system("cls");
				Sleep(500);
				OperateMenu();
				return;
			}
			else
			{
				system("cls");
				Sleep(500);
				GradeTwoMenu();
				return;
			}
		}
	}

}

void GradeThreeMenu()//二年级
{

	while (1)
	{
		system("cls");
		printf("*********************二年级小朋友好！********************************\n");
		printf("小兔崽子，你想做多少题呀？输入你要做的题数啊！\n");
		printf("你要是怕了就输入n退回主菜单。\n");
		printf("***************************************************************\n");
		printf("输入题数(怕了输n)：\n");
		char ch;
		int TitleNumber, i, temp;
		int Right = 0;
		int Number1, Number2, symbol, RightAnswer, YourAnswer;
		double accuracy;
		srand(time(0));
		scanf("\n%c", &ch);
		if (ch == 'n')
		{
			Sleep(500);
			OperateMenu();
			return;
		}
		else//选择答题
		{

			TitleNumber = ch - '0';
			for (i = 0; i < TitleNumber; i++)
			{
				Number1 = RandNumber(50);
				Number2 = RandNumber(50);
				symbol = RandSymbol(2);
				if (symbol == '/')
				{
					Number2 = RandNumber(20);
					Number1 = Number2 * (rand() % 10 + 1);
				}
				if (symbol == '*')
				{
					Number1 /= 5;
					Number2 /= 5;
				}
				printf("%d %c %d = ?\n", Number1, symbol, Number2);
				printf("来吧宝贝输入你的答案：\n");
				scanf("%d", &YourAnswer);
				switch (symbol)
				{
				case '+':RightAnswer = Number1 + Number2; break;
				case '-':RightAnswer = Number1 - Number2; break;
				case '*':RightAnswer = Number1 * Number2; break;
				case '/':RightAnswer = Number1 / Number2; break;
				}
				if (YourAnswer == RightAnswer) {
					Right++; printf("强啊!\n");
				}
				else { printf("菜鸡，正确答案：%d\n", RightAnswer); }
				printf("觉得太菜不想做了就输n，不然就输y继续\n");
				scanf("\n%c", &ch);
				if (ch == 'n')
				{
					Sleep(500);
					GradeThreeMenu();
				}

			}
			accuracy = (double(Right) / TitleNumber) * 100;
			if (accuracy < 60)printf("小老弟你不行啊，正确率:%.0f%", accuracy);
			else printf("可以啊小老弟，正确率:%.0f%c", accuracy, '%');
			printf("还要再来吗？\n");
			printf("请输入y/n：");
			scanf("\n%c", &ch);
			if (ch == 'n')> 
			{
				system("cls");
				Sleep(500);
				OperateMenu();
				return;
			}
			else
			{
				system("cls");
				Sleep(500);
				GradeThreeMenu();
				return;
			}
		}
	}

}

2.2.3 出题相关函数

int RandNumber(int limit);//生成随机数
char RandSymbol(int hard);//生成随机符号

• 随机数要输入一个参数决定生成的范围（参数为5，则范围为1~5）
• 随机符号也要输入一个参数（1为‘+’和‘-’，2为‘+’，‘-’，‘*’和‘/’）

int RandNumber(int limit)
{
	int number;
	number = rand() % (limit - 1) + 1;
	return number;
}

char RandSymbol(int hard)
{
	int n;
	if (hard == 1)n = rand() % 2;
	if (hard == 2)n = rand() % 4;
	switch (n)
	{
	case 0:return '+';
	case 1:return '-';
	case 2:return '*';
	case 3:return '/';
	}
}

2.3 运行结果

• 测试数据为一年级，题数为3题，每次都输入y来继续做题
  

2.4 总结

适当时机清屏会让界面很舒服