README.md

Graph-C-Implementation

undirected graph implementation in c using adjacency matrix

Installation

git clone https://github.com/Nanarow/Graph-C-Implementation.git

Usage

run main.exe

main.exe

Example

graph

(1)-------(2)
   \     / 
    \   /  
     (0)   
    /   \  
   /     \ 
(4)-------(3)

example code in main function

int  main()
{
	num_vertices  =  5; //set the number of vertices
	initGraph();  // fill adjacency matrix with 0
	addEdge(0,  1);  // add edge between vertex 0 and vertex 1
	addEdge(1,  2);
	addEdge(3,  4);
	addEdge(3,  0);
	addEdge(4,  0);
	addEdge(0,  2);

	print_matrix();  // print adjacency matrix
	print_graph();  // print adjacent vertices

	findAllCircuits();  
	printAllCircuits();  

	return  0;
}

output

Adjacency matrix:
 _0_1_2_3_4_
0|0 1 1 1 1
1|1 0 1 0 0
2|1 1 0 0 0
3|1 0 0 0 1
4|1 0 0 1 0

Adjacent vertices
Vertices: 5, Edges: 6
Vertex 0 is connect to (4) Degree: 1, 2, 3, 4,
Vertex 1 is connect to (2) Degree: 0, 2,
Vertex 2 is connect to (2) Degree: 0, 1,
Vertex 3 is connect to (2) Degree: 0, 4,
Vertex 4 is connect to (2) Degree: 0, 3,

All circuits:
Circuit 1 (length 4): 0 1 2 0
Circuit 2 (length 4): 0 3 4 0
Circuit 3 (length 4): 1 0 2 1
Circuit 4 (length 4): 2 0 1 2
Circuit 5 (length 7): 3 0 1 2 0 4 3  is Euler circuit
Circuit 6 (length 7): 4 0 1 2 0 3 4  is Euler circuit

find all circuits in graph using findAllCircuits() function and print all circuits in graph using printAllCircuits() function

printAllCircuits() can check circuit that can be Euler circuit