1. Demand Analysis
(1) automatically generates four arithmetic operation of Equation 2 number less than 10 100 (+ - * /), operation results are required within 100
(2) discarding duplicates equation. = 2 + 3 + 3 = 2 and Equation 2 is repeated and 3 + = 3 + 2 = not repeated formula
Number (3) title can be customized
(4) parameters can be controlled
Whether to include multiplication and division
Controllable range values of the operands (e.g., operands within 100 or within 1000)
Whether operands containing negative
(5) generating operation to an external file title stored in result.txt
2. Functional Design
3. Design and Implementation
4. Test Run
5. Paste feel more distinctive or satisfactory snippet
oid printf_equation(int number,int chengchu,int fanwei,int fushu)
{
FILE *fp=fopen("C:\\Users\\ASUS\\Desktop\\a\\suanshu.txt","at");
while(1)
{
int result ;
int x1=Number(fanwei,fushu);
char x2=Sign(chengchu);
int x3=Number(fanwei,fushu);
switch(x2)
{
case '+': result =x1+x3;break;
case '-': result =x1-x3;break;
case '*': result =x1*x3;break;
case '/': result =x1/x3;break;
}
if(result<=100&&result>=-100)
{
fprintf(fp,"%d %c %d = %d\n",x1,x2,x3,result);
number--;
}
if(!number)break;
}
char ch;
if((fp=fopen("suanshu.txt","r"))==NULL)
{
printf(" \n 保存失败 \n");
exit(0);
}
else
{
printf(" \n 保存在suanshu.txt成功 \n");
}
ch=fgetc(fp);
while(ch!=EOF)
{
putchar(ch);
ch=fgetc(fp);
}
fclose(fp);
6. Summary
Through this program I added his own shortcomings, my foundation is not solid, spent a lot of time in the process of writing code, but it can not achieve more functionality, run the test and sometimes an error, also found a method to modify future You will learn professional skills.
PSP reference
| PSP2.1 |
SUMMARY |
Plan time (min) required to complete a total of |
The actual time required for completion (min) |
| Planning |
plan |
8 |
6 |
| Estimate |
· Estimate how much time this task requires, and planning generally work steps |
8 |
6 |
| Development |
Develop |
82 |
88 |
| Analysis |
Needs analysis (including learning new technologies) |
6 |
10 |
| Design Spec |
Generate design documents |
5 |
6 |
| Design Review |
· Design Review (and his colleagues reviewed the design documents) |
4 |
6 |
| Coding Standard |
Code specifications (development of appropriate norms for the current development) |
3 |
3 |
| Design |
Specific design |
10 |
12 |
| Coding |
Specific coding |
36 |
21 |
| Code Review |
· Code Review |
7 |
9 |
| Test |
· Test (self-test, modify the code, submit modifications) |
13 |
21 |
| Reporting |
report |
9 |
6 |
| Test Report |
· testing report |
3 |
2 |
| Size Measurement |
Computing workload |
2 |
1 |
| Postmortem & Process Improvement Plan |
· Hindsight, and propose process improvement plan |
3 |
3 |