Answers for "encrypt message in c"

encrypt message in c

// Encryption : A is replaced by B, B is replaced by C and Z is replaced by A

#include <stdio.h>
#include <string.h>
void main()
{
    char arr[100];
    int i;

    printf("Enter the array: ");
    gets(arr);

    for(i=0; i<strlen(arr); i++)
    {
        if (arr[i]>=65 && arr[i]<90)
            arr[i] = arr[i] + 1;

        else if (arr[i]>=97 && arr[i]<122)
            arr[i] = arr[i] + 1;

        else if (arr[i] == 90)
             arr[i] ='A';

        else if (arr[i] == 122)
             arr[i] ='a';

        else
            printf("enter characters");
    }

    printf("\nEncrypted message is: \n\n");

    puts(arr);
}