Hiding the contents of communications that can be viewed by entities other than

Question

Hiding the contents of communications that can be viewed by entities other than the intended recipient could be done by encoding the message using a cypher and possibly a key known only the transmitting and receiving entities. Write a program that does the following. 1- Prompts the user to enter a word that is six letters long (all upper case). 2- Reads each character into a character type variable. 3- Ask the user for a cipher key, an integer between 2 and 8. 4- Store the Cipher key in an integer variable. 5- Add cipher key value to the ASCII value of each character. 6- Output the integer values adjusted by the cipher key on one line in the same order as the input with no spaces in between.

Explanation / Answer

#include < stdio.h >

int main() {

// Initialize the six letters long word
char str[6];

//initialize the cipher value as int
int cipher;

//Prompts the user to enter the six letter long word
printf("Enter the Word: ");
gets(str);

//Ask the user for the cipher value between 2 and 8

printf("Enter cipher value between 2 and 8 : ");

//Storing the cipher key in an integer variable

scanf("%d", & cipher);
int i = 0;

//Add the cipher key value to the ascii value of each character and outputs the integer
for (i = 0; i < 6; i++) {
printf("%d", str[i] + cipher);
}
return;
}

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