Lista 4 - Exercício 32

#include <stdio.h>
#include <string.h>

int main()
{
    int i,operation;
    char phrase[100];

    while (1)
    {
        printf("Entre com a operacao desejada : (ou qualquer outra tecla para sair)\n");
        printf("1 - Encriptar frase:\n2 - Decriptar frase:\n");
        scanf("%d",&operation);

        if (operation == 1)
        {
            printf("Entre com a frase a ser encriptada :\n");
            fflush(stdin);
            gets(phrase);
            printf("Sua frase criptografada :\n");
            for (i = 0; i < strlen(phrase); i++)
            {
                if (phrase[i] != ' ')
                    printf("%c",phrase[i]+1);
                else
                    printf("%c",phrase[i]);
            }
            printf("\n");
        }
        else if (operation == 2)
        {
            printf("Entre com a frase a ser decriptada :\n");
            fflush(stdin);
            gets(phrase);
            printf("Sua frase decriptada:\n");
            for (i = 0; i < strlen(phrase); i++)
            {
                if (phrase[i] != ' ')
                    printf("%c",phrase[i]-1);
                else
                    printf("%c",phrase[i]);
            }
            printf("\n");
        }
        else
        {
            printf("Programa terminado!\n");
            break;
        }
    }
    return 0;
}