Checking Validity of Social Number Program Plan: Include the required header files. Declare the prototype of the function isValidSocialSecurityNumber. Define the “isValidSocialSecurityNumber()” function. Check whether str1.length()!=11 or str1.find_first_of("-")!=3 or str1.find_last_of("-")!=6. If so then return false. Traverse through str1. If i is ‘-‘ at locations 3 or 6 then continue. If the traversed character is not a digit then return false. Return true. Define the “main()” function Create a string variable s and assign the social security number to it. Make a call to function isValidSocialSecurityNumber with s and assign to ans. If value of ans is 1 then display valid message. Else display invalid message.

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Chapter 21, Problem 21.25E

Program Plan Intro

Checking Validity of Social Number

Program Plan:

Include the required header files.

Declare the prototype of the function isValidSocialSecurityNumber.

Define the “isValidSocialSecurityNumber()” function.

Check whether str1.length()!=11 or str1.find_first_of("-")!=3 or str1.find_last_of("-")!=6.

If so then return false.

Traverse through str1.

If i is ‘-‘ at locations 3 or 6 then continue.

If the traversed character is not a digit then return false.

Return true.

Define the “main()” function

Create a string variable s and assign the social security number to it.

Make a call to function isValidSocialSecurityNumber with s and assign to ans.

If value of ans is 1 then display valid message.

Else display invalid message.

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