目录
一 个人相关信息
| 班级 |软件工程
| ---- | ---- | ---- |
| 作业要求 |个人作业-四则运算题目生成程序
| 作业目标 |用博客发表自己的代码，写一份四则运算代码|
| 学号 |3180701331|
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
1.整数加法
int add(int Grade) //加法函数
{
int a, b, c;
srand((unsigned)time(NULL));
a = rand() % 100; //随机生成数字
b = rand() % 100;
printf("请回答：\n %d + %d = ", a, b);
scanf_s("%d", &c);
if (a + b == c)
{
printf("回答正确!\n");
Grade = 1;
}
else
{
printf("回答错误!\n正确答案是%d", a + b);
Grade = 0;
}
return Grade;
}
2.整数减法
int sub(int Grade) //减法运算
{
int a, b ,c;
srand((unsigned)time(NULL));
a = rand() % 100; //随机生成数字
b = rand() % 100;
printf("请回答：\n%d - %d = ", a, b);
scanf_s("%d", &c);
if (a - b == c)
{
printf("回答正确!\n");
Grade = 1;
}
else
{
printf("回答错误!\n正确答案是%d",a-b);
Grade = 0;
}
return Grade;
}
3.整数乘法
int mul(int Grade)
{
int a, b ,c;
srand((unsigned)time(NULL));
a = rand() % 20; //随机生成数字
b = rand() % 20;
printf("请回答：\n%d * %d = ", a, b);
scanf_s("%d", &c);
if (a * b == c)
{
printf("回答正确!\n");
Grade = 1;
}
else
{
printf("回答错误!\n正确答案是%d",a*b);
Grade = 0;
}
return Grade;
}
4.整数除法
int div(int Grade)
{
int a,b,c,m,n,j,k; //a为被除数，除数为b，c为用户输入商，m为结果商，j为结果余数,k为用户输入余数
srand((unsigned)time(NULL));
a = rand() % 20; //随机生成数字
b = rand() % 20;
printf("请回答：\n%d / %d 商为=，余数为=", a, b);
scanf_s("%d，%d", &c,&k);
m=a/b;
n = b * m;
j = a - n;
if (m == c&&j==k)
{
printf("回答正确!\n");
Grade = 1;
}
else
{
printf("回答错误!\n正确答案商%d，余数为%d",m,j);
Grade = 0;
}
return Grade;
}
5.求最大公约数
int func(int m, int n) //求最大公约数
{
int tmp;
m = abs(m);
n = abs(n);
if (m == n)
return m;
if (m < n)
{
tmp = m;
m = n;
n = tmp;
}
while (m % n != 0)
{
tmp = m;
m = n;
n = tmp % n;
}
return n;
}
6.分数加法
int Sadd(int Grade = 0) //分数加法
{
int flag = 0;
int x1, x2, y1, y2, Mcon, Mcon1;//x1,x2为分子,y1，y2为生成的分母数字用于加法计算.
int z1 = 0, z2 = 0, z3 = 0, z4 = 0;//z1是输入的分子，z2是分母 z3是答案的分子，z4是答案的分母。
srand((unsigned)time(NULL));
x1 = rand() % 10;
x2 = rand() % 10;
y1 = rand() % 10;
y2 = rand() % 10;
printf("%d/%d+%d/%d=?", x1, y1, x2, y2);
printf("请输入答案的分子:");
scanf_s("%d", &z1);
printf("请输入答案的分母:");
scanf_s("%d", &z2);
Mcon1 = func(y1, y2);
Mcon = y1 * y2;
z4 = Mcon;
z3 = Mcon / y1 * x1 + Mcon / y2 * x2;
if (z1 == (z3 = z3 / Mcon1) && z2 == (z4 = z4 / Mcon1))
{
printf("答案正确。\n");
Grade=1;
}
else
{
printf("答案错误，正确答案为%d/%d\n", z1, z4);
Grade = 0;
}
return Grade;
}
7.分数减法
int Ssub(int Grade = 0)
{
int flag = 0;
int x1, x2, y1, y2, Mcon, Mcon1;//x1,x2为分子,y1，y2为生成的分母数字用于加法计算.
int z1 = 0, z2 = 0, z3 = 0, z4 = 0;//z1是输入的分子，z2是分母 z3是答案的分子，z4是答案的分母。
srand((unsigned)time(NULL));
x1 = rand() % 10;
x2 = rand() % 10;
y1 = rand() % 10;
y2 = rand() % 10;
printf("%d/%d-%d/%d=?", x1, x2, y1, y2);
printf("请输入答案的分子:");
scanf_s("%d", &z1);
printf("请输入答案的分母:");
scanf_s("%d", &z2);
Mcon1 = func(y1, y2);
Mcon = y1 * y2;
z4 = Mcon;
z3 = Mcon / y1 * x1 - Mcon / y2 * x2;
if (z1 == (z3 = z3 / Mcon1) && z2 == (z4 = z4 / Mcon1))
{
printf("答案正确。\n");
Grade=1;
}
else
{
printf("答案错误，正确答案为%d/%d\n", z3, z4);
Grade = 0;
}
return Grade;
}
8.分数乘法
int Smul(int Grade = 0)
{
int x1, x2, y1, y2, Mcon, Mcon1;//x1,x2为分子,y1，y2为生成的分母数字用于加法计算.
int z1 = 0, z2 = 0, z3 = 0, z4 = 0;//z1是输入的分子，z2是分母 z3是答案的分子，z4是答案的分母。
srand((unsigned)time(NULL));
x1 = rand() % 10;
x2 = rand() % 10;
y1 = rand() % 10;
y2 = rand() % 10;
printf("%d/%d*%d/%d=?", x1, x2, y1, y2);
printf("请输入答案的分子:");
scanf_s("%d", &z1);
printf("请输入答案的分母:");
scanf_s("%d", &z2);
Mcon1 = func(y1, y2);
Mcon = y1 * y2;
z4 = Mcon;
z3 = (Mcon / y1 * x1) * (Mcon / y2 * x2);
if (z1 == (z3 = z3 / Mcon1) && z2 == (z4 = z4 / Mcon1))
{
printf("答案正确。\n");
Grade=1;
}
else
{
printf("答案错误，正确答案为%d/%d\n", z3, z4);
Grade = 0;
}
return Grade;
}
9.分数乘法
int Sdiv(int Grade = 0)
{
int x1, x2, y1, y2, Mcon, Mcon1;//x1,x2为分子,y1，y2为生成的分母数字用于加法计算.
int z1 = 0, z2 = 0, z3 = 0, z4 = 0;//z1是输入的分子，z2是分母 z3是答案的分子，z4是答案的分母。
srand((unsigned)time(NULL));
x1 = rand() % 10;
x2 = rand() % 10;
y1 = rand() % 10;
y2 = rand() % 10;
printf("%d/%d / %d/%d=?", x1, x2, y1, y2);
printf("请输入答案的分子:");
scanf_s("%d", &z1);
printf("请输入答案的分母:");
scanf_s("%d", &z2);
Mcon1 = func(y1, y2);
Mcon = y1 * y2;
z4 = Mcon;
z3 = (Mcon / y1 * x1) / (Mcon / y2 * x2);
if (z1 == (z3 = z3 / Mcon1) && z2 == (z4 = z4 / Mcon1))
{
printf("答案正确。\n");
Grade=1;
}
else
{
printf("答案错误，正确答案为%d/%d\n", z3, z4);
Grade = 0;
}
return Grade;
}
10.主函数
int main()
{
int Num, Score, Choice, Grade; //题目数量、得分、题目选择、每题得分
printf("欢迎进入小学四则运算。\n");
printf("请输入题目数量\n");
scanf_s("%d", &Num);
Score = 0;
for (Num; Num >= 1; Num--)
{
printf("\n请选择四则运算的种类，输入1-9\n");
printf("1.加法运算\n");
printf("2.减法运算\n");
printf("3.乘法运算\n");
printf("4.除法运算\n");
printf("5.分数加法运算\n");
printf("9.我想推出这次的训练。\n");
scanf_s("%d", &Choice);
Grade = 0;
switch (Choice)
{
case 1:
{
printf("这是加法运算\n");
Score += add(Grade);
}break;
case 2:
{
printf("这是减法运算\n");
Score += sub(Grade);
}break;
case 3:
{
printf("这是乘法运算\n");
Score += mul(Grade);
}break;
case 4:
{
printf("这是除法运算\n");
Score += div(Grade);
}break;
case 5:
{
printf("这是分数加法运算\n");
Score += Sadd(Grade);
}break;
case 6:
{
printf("这是分数减法运算\n");
Score += Ssub(Grade);
}break;
case 7:
{
printf("这是分数乘法运算\n");
Score += Smul(Grade);
}break;
case 8:
{
printf("这是分数除法运算\n");
Score += Sdiv(Grade);
}break;
case 9:
{
printf("我想推出这次的训练。\n");
Num = 0;
}break;
default:printf("非法操作\n"); break;
}
}
printf("您的最终成绩为：%d分\n\n\n\n\n\n\n",Score);
}
四、运行界面
五、个人小结
1.psp表格
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） |
- | :-: | :-: | :-: | -:
Planing |计划 |30 |25 |
Estimate |估计这个任务需要多少时间，
并规划大致工作步骤 |300 | 350 |
Development |开发| 300| 300|
Analysis |需求分析（包括学习新技能）|60|90|
Design Spec|生成设计文档|10|20|
Design Review|设计审核|15|15|
Coding Standard|代码规范|8|10|
Design|具体设计|10|12|
Coding|具体编码|300|300|
Code Review|代码复核|15|20|
Test|测试（自我测试，修改代码
提交修改）|60|60|
Reporting|报告|15|15|
Test Report|测试报告|6|10|
Size Measurement|计算工作量|25|25|
Postmortem & Process
Improvement|事后总结，并提出过程修改计划|5|5|
2.经历
经过这此在博客上使用markdown进行编写自己的博文，首先感觉很有一种自己的成就感，希望在以后可以用自己的努力，编写更多更加规范的代码，肯定很开心，我更希望以后可以编写更多的代码，通过一次次的训练让自己的能力更进一步。
