四则运算

一.作业规范要求

博客班级	班级链接
作业要求	作业链接
作业目标	学习markdown的语法编辑及培养编程能力
学号	3180701138

二.题目要求

写一个能自动生成小学四则运算题目的程序，然后在此基础上扩展：

1）除了整数以外，还要支持真分数的四则运算，例如：1/6+1/8=7/24

2）程序要求能处理用户的输入，判断对错，累积分数

3）程序支持可以由用户自行选择加、减、乘、除运算

4）使用-n参数控制生成题目的个数，例如Myapp.exe -n 10，将生成10个题目

三.代码提交

include<stdio.h>

include<time.h>

include<stdlib.h>

include<string.h>

define MAXSIZE 100

void Add(double anw,int state);
void Subt(double anw,int state);
void Mulpt(double anw,int state);
void Div(double anw,int state);
void AnwserClear(double arry,int n);
void main()
{
int i,subNum,select,state=0,num;
int grade=0,m=1;
double anwDou[MAXSIZE],anwInput[MAXSIZE];
printf("\n\n\n\t\t欢迎使用沙雕小学四则运算题目生成程序\n");
printf("\t\t\t1.加法运算\n");
printf("\t\t\t2.减法运算\n");
printf("\t\t\t3.乘法运算\n");
printf("\t\t\t4.除法运算\n");
printf("\t\t\t5.自由生成\n");
printf("\t\t\t0.退出\n");
printf("\n\n\t\t注:分数运算结果保留2位小数***\n");
printf("输入1、2、3、4、5、0:");
srand((unsigned int)time(0));
while(m)
{
//system("cls");
scanf("%d",&select);
printf("请输入生成的题目数量:");
scanf("%d",&subNum);
switch(select)
{
case 1:

			for(i=0;i<subNum;i++)
			{
				Add(anwDou,state);
				state++;
			}
			break;
		case 2:
			for(i=0;i<subNum;i++)
			{
				Subt(anwDou,state);
				state++;
			}
			break;
		case 3:
			for(i=0;i<subNum;i++)
			{
				Mulpt(anwDou,state);
				state++;
			}
			break;
		case 4:
			for(i=0;i<subNum;i++)
			{
				Div(anwDou,state);
				state++;
			}
			break;
		case 5:
			for(i=0;i<subNum;i++)
			{
				num=rand()%4+1;
				switch(num)
				{
					case 1:
						Add(anwDou,state);
						state++;
						break;
					case 2:
						Subt(anwDou,state);
						state++;
						break;
					case 3:
						Mulpt(anwDou,state);
						state++;
						break;
					case 4:
						Div(anwDou,state);
						state++;
						break;
				}
			}
		case 0:
			m=0;
			break;
	}
	printf("请输入你的答案:\n");
	for(i=0;i<subNum;i++)
	{
		printf("%d.",i+1);
		scanf("%d",&anwInput[i]);
	}
	for(i=0;i<subNum;i++)
		if((anwDou[i]*100-anwInput[i]*100)/1==0)
			grade++;
	printf("你的成绩是%d",grade);
	AnwserClear(anwDou,state);
	state=0;
	getchar();
}

}
void Add(double anw,int state)
{
int num1,num2,num3,m1,m2;
srand((unsigned int)time(0));
num1=rand()%100+1;
num2=rand()%100+1;
num3=rand()%2+1;
switch(num3)
{
case 1:
printf("%d. %d+%d\n",state+1,num1,num2);
anw[state]=(double)num1+num2;
break;
case 2:
m1=rand()%(num1-1)+1;
m2=rand()%(num2-1)+1;
printf("%d. %d/%d+%d/%d",m1,num1,m2,num2);
anw[state]=(m1num2+m2num1)/(double)(num1num2);
break;
}
}
void Subt(double anw,int state)
{
int num1,num2,num3,m1,m2;
srand((unsigned int)time(0));
num1=rand()%100+1;
num2=rand()%100+1;
num3=rand()%2+1;
switch(num3)
{
case 1:
if(num1>num2)
{
printf("%d. %d-%d\n",state+1,num1,num2);
anw[state]=(double)num1-num2;
}
else
{
printf("%d. %d-%d\n",state+1,num2,num1);
anw[state]=(double)num2-num1;
}
break;
case 2:
m1=rand()%(num1-1)+1;
m2=rand()%(num2-1)+1;
if((m1/(double)num1)>(m2/(double)num2))
{
printf("%d. %d/%d-%d/%d",state+1,m1,num1,m2,num2);
anw[state]=(m1num2-m2num1)/(double)(num1num2);
}
else
{
printf("%d. %d/%d-%d/%d",state+1,m2,num2,m1,num1);
anw[state]=(m2num1-m1num2)/(double)(num1num2);
}
break;
}
}
void Mulpt(double anw,int state)
{
int num1,num2,num3,m1,m2;
srand((unsigned int)time(0));
num1=rand()%100+1;
num2=rand()%100+1;
num3=rand()%2+1;
switch(num3)
{
case 1:
printf("%d. %d%d\n",state+1,num1,num2);
anw[state]=(double)num1num2;
break;
case2:
m1=rand()%(num1-1)+1;
m2=rand()%(num2-1)+1;
printf("%d. (%d/%d)(%d/%d)",m1,num1,m2,num2);
anw[state]=(m1m2)/(double)(num1num2);
break;
}
}
void Div(double anw,int state)
{
int num1,num2,num3,m1,m2;
srand((unsigned int)time(0));
num1=rand()%100+1;
num2=rand()%100+1;
num3=rand()%2+1;
switch(num3)
{
case 1:
printf("%d. %d/%d\n",state+1,num1,num2);
anw[state]=(double)num1/num2;
break;
case2:
m1=rand()%(num1-1)+1;
m2=rand()%(num2-1)+1;
printf("%d. (%d/%d)/(%d/%d)",m1,num1,m2,num2);
anw[state]=(m1num2)/(double)(num1m2);
break;
}
}
void AnwserClear(double *arry,int n)
{
int i;
for(i=0;i<n;i++)
arry[i]=0;

}

四.个人小结

psp2.1	任务内容	计划完成需要的时间（min）	实际完成需要的时间（min）
Planning	计划	25	30
Estimate	估计这个任务需要多少时间，并规划大致工作步骤	10	10
Development	开发	120	240
Analysis	需求分析（包括学习新技术）	12	24
Design Spec	生成设计文档	5	8
Design Review	设计复审	5	8
Coding Standard	代码规范	3	5
Design	具体设计	10	10
Coding	具体编码	40	45
Code Review	代码复审	5	10
Test	测试（自我测试，修改代码，提交修改）	20	15
Reporting	报告	10	15
Test Report	测试报告	5	8
Size Measurement	计算工作量	10	20
Postmortem & Process Improvement Plan	事后总结，并提出过程改进计划	10	20

个人小结：通过学习明白了MarkDown是一种简单方便的标记语法，可以边写边预览效果，创建容易且使用简单。