To Extract and Run the Program for the First Time:
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First extract the tar file with "tar -xvf archive.tar"
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Then execute the "make" command to create the executable for the program
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Then execute "./DET" to run the program with the given hardcoded matrix
To Change The Input Matrix:
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Open the DET.c file with "vi DET.c"
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Navigate down to the main() function, the first line will have the hardcoded input matrix
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Change this array to any 3x3 matrix you'd like
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Exit the file and run the "make" command again
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Then execute "./DET" to run the program with the new hardcoded input matrix