Answered! C or C++ ONLY PLEASE Title Functions Functional Requirements Write a program that receives a 5-digit integer number from user a…

C or C++ ONLY PLEASE

Title

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Functions

Functional Requirements

Write a program that receives a 5-digit integer number from user and perform encryption and decryption on it as follows:

Encryption: Every single digit will be increased by 3. For example 1 goes to 4, 6 goes to 9, 7 goes to 0, 8 goes to 1, etc

Decryption: Every single digit will be decreased by 3. For example, 9 goes to 6, 3 goes to 0, 2 goes to 9, 1 goes to 8, etc.

Structure of your program will look like this:

int data;

void Encrypt() {

       //your code here

}

void Decrypt() {

       //your code here

}

void main() {

       //get data from user

       //encrypt

       Encrypt();

       //save and print encrypted value here

       //decrypt

       Decrypt();

       //save and print decrypted value here

       //compare decrypted data and original data to make sure they are ok

       //print a message saying encryption was successful or not

}

Expert Answer

 #include<stdio.h>

int data;

void Encrypt();
void Decrypt();

void main() {
//get data from user

printf(“Enter the 5 digit number to be encryptedn”);
scanf(“%d”,&data);

//encrypt
Encrypt();
//save and print encrypted value here
int encryptedData=data;
printf(“Encrypted value: %dn”,data);

//decrypt
Decrypt();
//save and print decrypted value here
int decryptedData=data;
printf(“Decrypted value: %dn”,data);

//compare decrypted data and original data to make sure they are ok
//print a message saying encryption was successful or not

if(encryptedData==decryptedData){
printf(“Encryption successful”);
}else{
printf(“Encryption not successfull”);
}
}

void Encrypt(){
int temp=0,i;

for(i=0;i<5;i++){
temp=temp*10+(((data%10)+3)%10);
data=data/10;
}
data=0;
for(i=0;i<5;i++){
data=data*10+(temp%10);
temp=temp/10;

}
}

void Decrypt(){
int temp=0,i;

for(i=0;i<5;i++){
int j=(data%10)-3;
if(j<0){
j=j+10;
}
temp=temp*10+j;
data=data/10;
}

data=0;
for(i=0;i<5;i++){
data=data*10+(temp%10);
temp=temp/10;
}
}

OUTPUT:

Answered! C or C++ ONLY PLEASE Title Functions Functional Requirements Write a program that receives a 5-digit integer number from user a... 1

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