C program to encrypt and decrypt a password

C program to encrypt and decrypt a password

#include <stdio.h>

#include <string.h>

void encrypt(char password[],int key)

{

    unsigned int i;

    for(i=0;i<strlen(password);++i)

    {

        password[i] = password[i] - key;

    }

}

void decrypt(char password[],int key)

{

    unsigned int i;

    for(i=0;i<strlen(password);++i)

    {

        password[i] = password[i] + key;

    }

}

int main()

{

    char password[20] ;

    printf("Enter the password: n ");

    scanf("%s",password);

    printf("Passwrod     = %sn",password);

    encrypt(password,0xFACA);

    printf("Encrypted value = %sn",password);

    decrypt(password,0xFACA);

    printf("Decrypted value = %sn",password);

    return 0;

}