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flowchart-to-code

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A Toolkit for Converting Flowcharts to Pseudocode

flowchart-to-code 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# Flowchart2Code

Convert Flowchart into Pseudo-Code.

This code:
- Can generate code containing BREAK, CONTINUE, RETURN, WHILE, DOWHILE, IF, ELIF.
- Support complex flowcharts, such as the Condition nodes with more than 2 outgoing edges.

## Examples
### [input1](https://github.com/LiuZeJie97/flowchart-to-code/blob/master/examples/input1.txt)
<p align="center">
<img src="https://github.com/LiuZeJie97/flowchart-to-code/blob/master/img/FC_example_1.png" width="400"/>
<p>

### output1

```python
def twoSum(self, nums, target):
    Set n to the length of the array num. 
    Set i as the index of the array, the initial value is 0
    While (I is less than n?):
        Define j as the subscript of the array, and the initial value of j is i+1
        While (I is less than n?):
            if (The sum of nums[i] and nums[j] is equal to the target):
                output:  Return their array indices
                return
            Increment j
        Increment i
    output:  Returns an empty list
    return
```

### [input2](https://github.com/LiuZeJie97/flowchart-to-code/blob/master/examples/input2.txt)
<p align="center">
<img src="https://github.com/LiuZeJie97/flowchart-to-code/blob/master/img/FC_example_2.png" width="400"/>
<p>

### output2

```python
def function():
    while true:
        if (a):
            8
            break
        elif (b):
            9
            break
        elif (c):
            return
        2
        if (e):
            break
        if (d):
            4
            continue
        elif (g):
            5
        elif (f):
            6
        else:
        if (h):
            continue
        else:
            return
    10
    return
```
## QuickStart
```cpp
#include "AvtivityCodeGen.h"

int main()
{
    AvtivityCodeGen cg;
    cg.FC2Pseudocode("examples\\input1.txt", "examples\\output1.txt");
    return 0;
}
```

## Method

We used the method propesed by [Wang et al.](https://journal.xidian.edu.cn/xdxb/CN/abstract/abstract11616.shtml#1.) to generate pseudo-code from the flowchart:

- Step 1: Find out the loop and selection in the flowchart. 
Flowchart is a combination of two basic structures: selection and loop. 
[Wang et al.](https://journal.xidian.edu.cn/xdxb/CN/abstract/abstract11616.shtml#1.) found that the flowchart can be seen as a directed graph, in which each loop forms a strongly connected sub-graph. They used this method to find all the loop structures in the flowchart. Then, the structures led by the remaining Condition nodes are selection structures.

- Step 2: Identify the nodes (e.g. while) and edges (e.g. continue, break, return) associated with the special structures in the loop. 
We identified these structures based on their characteristics. For example: 1) The True branch of the continue node will point to the while node. 2) The True branch of the break and return nodes will jump out of the loop.

- Step 3: Identify the scoping of Selection. 
In the first step, we have found the Condition nodes related to selection. In this step, we need to find where the 2 branches of the selection meet.

- Step 4: Generate pseudo-code. To generate the pseudo-code, the model will rereank the nodes according to the structure of the flowchart and convert it into the pseudo-code.

## Acknowledgements
Work done under the guidance of [Lin Li]() and [Deyu Zhou](http://palm.seu.edu.cn/zhoudeyu/Home.html) during the internship in [Nanjing Origin Information Technology Company](http://www.iamqy.com/) and [PAttern Learning and Mining(PALM) Lab of Southeast University](http://palm.seu.edu.cn/).

## References
The method was proposed in the paper ["Research on and implementation of the algorithm from the program flowchart to the code"](https://journal.xidian.edu.cn/xdxb/CN/abstract/abstract11616.shtml#1.), and implemented in the paper ["Code Generation From Flowcharts with Texts: A Benchmark Dataset and An Approach"](https://aclanthology.org/2022.findings-emnlp.449/). If you found this code useful, please cite the following papers:
- [WANG Liming;WANG Guonü;ZHOU Mingyuan;CHU Yanli;CHEN Ke;CHEN Ping. Research on and implementation of the algorithm from the program flowchart to the code[J]. J4, 2012, 39(6): 70-77.](https://journal.xidian.edu.cn/xdxb/CN/abstract/abstract11616.shtml#1.)
- [Zejie Liu, Xiaoyu Hu, Deyu Zhou, Lin Li, Xu Zhang, and Yanzheng Xiang. 2022. Code Generation From Flowcharts with Texts: A Benchmark Dataset and An Approach. In Findings of the Association for Computational Linguistics: EMNLP 2022, pages 6069–6077, Abu Dhabi, United Arab Emirates. Association for Computational Linguistics.](https://aclanthology.org/2022.findings-emnlp.449)

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