027_Paridad.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

Include dependency graph for 027_Paridad.c:

Go to the source code of this file.

Macros
#define	BIT(n)
#define	BIT_TOGGLE(x, n)
#define	NC   100

Functions
int	main (int argc, char *argv[])

Macro Definition Documentation

BIT

#define BIT

(

n

)

Value:

(1<<(n))

Definition at line 5 of file 027_Paridad.c.

BIT_TOGGLE

#define BIT_TOGGLE	(		x,
			n )

Value:

((x) ^= BIT(n))

Definition at line 6 of file 027_Paridad.c.

NC

#define NC   100

Definition at line 7 of file 027_Paridad.c.

Function Documentation

main()

int main	(	int	argc,
		char *	argv[] )

Definition at line 9 of file 027_Paridad.c.

{
    char msg[NC+1], p, v;
    int i, nc, _nc, _nb;
    srand(time(NULL));
    i=0;
    do{
        msg[i++] = getc(stdin);
    }while(msg[i-1]!=10&&i<NC);
    nc = i-1;
    msg[nc] = '\0';
    for(i=0, p=0; i<nc; i++)
        p^=msg[i];
    for(i=0, v=p; i<nc; i++)
        v^=msg[i];
    printf("MSG: %s(%d)-%c-%d\n", msg, nc, p, (int )v);
    _nc = rand()%nc;
    _nb = rand()%(8*sizeof(char));
    BIT_TOGGLE(msg[_nc], _nb);
    for(i=0, v=p; i<nc; i++)
        v^=msg[i];
    printf("MSG: %s(%d)-%c-%u\n", msg, nc, p, (unsigned int)v);
    return 0;
}