20194726 automatically generates four arithmetic problem first edition report

First, the needs analysis

     Making operation code.

Second, the functional design

(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

Third, the design and implementation

   

 

 

 

Fourth, the test  

V. snippet

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define RANDOM(v1,v2)(rand()%((v2+1)-(v1))+(v1))
#define N 10
int main()
{

int V1, V2, I, n-, A;
a float C, D;
char OP, OPS [] = { '+', '-', '*', '/'};
srand (Time (NULL));
do
{
the printf ( "\ n-enter the number 1 starts, -1 exit the program:");
Scanf ( "% D", & n-);
Switch (n-)
{
Case 1:
{
for (I = 0; I <N; ++ I)
{
V1 = RAND ()% 201-100;
V2 = RAND ()% 201-100;
OP = OPS [the RANDOM (0,3)];
Switch (OP)
{
Case '+': = A V1 + V2 ; BREAK;
Case '-': A = V1-V2; BREAK;
Case '*': A = V1 * V2; BREAK;
Case '/': A = V1 / V2; BREAK;
}
the printf ( "% D% C D = D%% \ n-", V1, OP, V2, A);
}
BREAK;
}
BREAK;

}

}while(n!=-1);

Six experimental summary 

      The work through the access to information and ask students finally done, good heavy.

Seven, PSP

PSP2.1	SUMMARY	Plan completed required Time (min)	The actual completion of the required Time (min)
Planning	plan	335	376
Estimate	It estimated that the task requires much time and planning generally work steps	60	50
Development	Develop	80	100
Analysis	Needs analysis (including learning new technologies)	8	10
Design Spec	Generate design documents	30	30
Design Review	Design review (and colleagues reviewed the design documents)	30	35
Coding Standard	Code specifications (development of appropriate norms for the current development)	30	35
Design	Specific design	20	25
Coding	Specific coding	35	45
Code Review	Code Review	10	10
Test	Test (self-test, modify the code, submit modifications)	5	7
Reporting	report	10	11
Test Report	testing report	2	5
Size Measurement	Computing workload	10	10
Postmortem & Process Improvement Plan	Later summarized, and process improvement plan	5	3