o write a C program to encrypt and decrypt text files. Yourprogram (encrypt decrypt) will take four arguments: a key (key),mode keyword (ENCRYPT/DECRYPT), and two text files, an and . If thekeyword is ENCRYPT the program should read the first text file(plaintext) and produce an encrypted text file (cyphertext).Conversely, if the keyword is DECRYPT, the first file is anencrypted file (cyphertext), and the output should be a decryptedtext file (plaintext)
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