Chapter 8, Problem 11PP

Program Plan Intro

Decryption of the intercepted message

Program plan:

• Include necessary header files.
• Declare the namespace.
• Declare the function “decrypt()”.
• Define the function “decrypt()”.
  • Declare the necessary variables.
  • Use “for” loop to iterate the string length using the function “strlen()”.
    • Encode the string and assign the result into the variable “Encrypt”.
    • The “if” loop check the condition.
      • True, use the formula to decrypt the message.
    • Otherwise, use the formula to decrypt the message.
    • Assign the decrypted message into the variable “decode[i]”.
• Define the “main()” function.
  • Declare and initialize the necessary variables.
  • Use “for” loop to iterate the number or key between “1” to “100”.
    • Call the function “decrypt()”.
    • Print the result.
  • Return “0”.