1.Implement the DFS algorithm in C++ or in the C programming language using a
stack and arrays. Demonstrate its performance on the following graphs and source
vertices. Store the graphs as adjacency matrices (2D arrays) as shown in class/blackboard
example after reading in the graph text files. First, convert each graph into an edge list
and save it as a text file. Your program should read in the text file and store the graph as
an adjacency matrix (use the method covered in class, or a similar method). Make sure to
use command line arguments. The first argument is the filename and the second
argument is the number of nodes. Print out the order in which
the nodes are visited.
Note 1: in C++ you can use the header file “stack” (see Blackboard example) and declare a stack
as stack S; if using C then you will have to implement your own stack.
DFS Pseudocode (for graph with n vertices):
Input: grapharray[n][n], source
int visited[n] (array to keep track of nodes visited, all values
set to 0 except source which is set to 1 i.e. 0 = not visited, 1
while(S is not empty)
v = S.top
for each neighbor w of v
if visited[w] = 0
visited[w] = 1
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