C language I work 09

This work belongs to the curriculum	C Programming Language II
Where the job requires	C language blog I work 09
My aim in this course is	C language proficiency
In particular aspects of the job which helped me achieve goals	Mastered for circulation, learned to break statement and continue statement
references	The basic syntax of Markdown

A .PTA lab assignments

1. painting box together with Obama

Topic Description: US President Barack Obama not only appeal to everyone to learn programming, and even set an example to write code, write computer code to become the first president in American history. The end of 2014, to celebrate the "Computer Science Education Week" was officially launched, Obama wrote the computer code is very simple: draw a square on the screen. Now you draw it with him!

Input formats:

 输入在一行中给出正方形边长N（3≤N≤21）和组成正方形边的某种字符C，间隔一个空格。

Output formats:

输出由给定字符C画出的正方形。但是注意到行间距比列间距大，所以为了让结果看上去更像正方形，我们输出的行数实际上是列数的50%（四舍五入取整）。

Sample input:

10 a

Sample output:

 aaaaaaaaaa
 aaaaaaaaaa
 aaaaaaaaaa
 aaaaaaaaaa
 aaaaaaaaaa

(1) Data processing

 数据表达:
     用了整形变量 n,i,j;和字符型变量 a;
     n代表正方形的边长
     j，i分别用来表示两个控制变量

Data processing: pseudocode

 开始 
    int n,i,j;//输入整型变量
char a;//字符型变量
scanf("%d ",&n);
scanf("%c",&a);
if(n%2==0)  //当n为偶数时
for(i=1;i<=n/2;i++)   //n/2行
{
    for(j=1;j<=n;j++)    //每行n个
    {
        printf("%c",a);//输出a
    }
    printf("\n");//换行
}
if(n%2!=0)    //当n为奇数时
for(i=1;i<=(n+1)/2;i++)    //(n+1)/2行
{
    for(j=1;j<=n;j++)   //每行n个
    {
        printf("%c",a);//输出a
    }
    printf("\n");//换行
}
return 0;

}

(2) Experimental Code screenshot

(3) making test data

Input data	Output Data	Explanation
5 a	aaaaa aaaaa aaaaa	For the long side 5a, a block width 3a
6 a	aaaaaa aaaaaa aaaaaa	For the long side 6a, a block width 3a
4 a	aaaa aaaa	For the long side 4a, a block width 2a

(4) PTA submit a list and description

Submit a list of instructions

 1.编译错误:第8行中少了一个=
 2.编译错误：第17行中少了一个！
 3.答案正确：在第8行上加一个=，在第17行中加一个！

2. Print ninety-nine formulas table

Topic Description: The following is a complete list of lower triangular ninety-nine formulas:

11=1
12=2 22=4
13=3 23=6 33=9
14=4 24=8 34=12 44=16
15=5 25=10 35=15 45=20 55=25
16=6 26=12 36=18 46=24 56=30 66=36
17=7 27=14 37=21 47=28 57=35 67=42 77=49
18=8 28=16 38=24 48=32 58=40 68=48 78=56 88=64
19=9 29=18 39=27 49. 5 = 36 9. 6 = 45 9. 7 = 54 9. 8 = 63 9 = 72 9 9 = 81
The title requirements for any given a positive integer N, the output from one 1 to N * N table portion formulas.

Input formats:

 输入在一行中给出一个正整数N（1≤N≤9）。

Output formats:

 输出下三角N*N部分口诀表，其中等号右边数字占4位、左对齐。

Sample input:

  4

Sample output:

  1*1=1   
  1*2=2   2*2=4   
  1*3=3   2*3=6   3*3=9   
  1*4=4   2*4=8   3*4=12  4*4=16 

(1) Data processing

 数据表达:用了整型变量N，i,j
        N代表任意给定的一位正整数
        i和j分别表示九九乘方表中的数字

Data are expressed: pseudocode

 开始
 int main()
{
     int N;//输入整型变量
     int i,j;//输入整型变量
     scanf("%d",&N);
     for(j=1;j<=N;j++)//N行
        {
        for(i=1;i<=j;i++)//每行j个
        printf("%d*%d=%-4d",i,j,i*j);//输出i，j，i*j
        printf("\n");//换行
        }
}

(2) Experimental Code screenshot

(3) making test data

Input data	Output Data	Explanation
1	1*1=1	Table 1 is output to the formulas
2	11=1 12=2 2*2=4	Outputted from the partial formulas of Table 1-2
3	11=1 12=2 22=4 13=3 23=6 33=9	Outputted from the partial formulas 1-3 Table

(4) PTA submit a list and description

Submit a list of instructions

 1.编译错误：第6行括号中没有加，
 2.部分正确:第10行没有写i*j
 3.部分正确：第10行没有写i*j
 4.全部正确：在第6行中加， 第10行中加i*j

II. Code peer review

Students Code:

Own codes:

Compare

 (1)第一份代码用了double浮点型和char字符型，结构上该同学的更加整洁美观，也更容易懂。
 (2)第二份的代码用了char op字符型变量，而我用的char 定义不同，他用到了if-else，而我只用了if。
 (3)第一份代码行只有16行，而我有27行，他的比我的更加简单，也节省空间。

III. Learning summary

1. Learn the progress bar

Week / Date	This week the time spent	Lines of code	Learned knowledge Introduction	Currently more confusing issues
the fourth week	7 hours	100 lines	Hello World is displayed on the screen!	no
fifth week	8 hours	100 lines	Seeking corresponding Fahrenheit Celsius	no
Sixth Week	21 hours	400 lines	How MinGW-w64 to compile C program	no
Week Seven	24 hours	Line 478	Use an if statement to complete a variety of mathematical procedures	For && usage do not know, now operating unskilled
Eighth Week	20 hours	349 line	Master cycle program designed to be used for loop to achieve a specified number of times	no
Week Nine	23 hours	264 line	Learn to use a custom function	Currently less skilled
The tenth week	22 hours	167 line	Familiar with multi-branch structure, character data types and logical operators	Yet completely familiar
Week 11	18 hours	150 lines	Familiar with multi-branch structure of the switch statement	no
Week Twelve	16 hours	130 line	Familiar with while and do-while structure to solve the problem	There is less skilled
Week 13	15 hours	120 lines	Familiar with for structure, understand and master the break statement and continue statement	There is less skilled continue statement

2. Cumulative lines of code words and blog

time	Words blog	The number of lines of code
the fourth week	525	50
fifth week	645	100
Sixth Week	645	400
Week Seven	2659	478
Eighth Week	3586	597
Week Nine	4769	698
The tenth week	5897	787
Week 11	6289	897
Week Twelve	7594	1056
Week 13	8679	1170

3. insights and learning content summary

(1) learning content summary

(2) learning experience

C language learning for some time, the more we learn the more difficult back last week to learn the do-while statement this week to learn the break statement and continue statement, and know the difference between these two statements, but also added a coding skills, but also learned new knowledge of C language, now not as hard when compiled code, but still less skilled, but the topic has become increasingly difficult, and I still lack a lot of exercise, but also a lot of lack of knowledge, I after also need to practice harder and spend more time here, towards my goal