#include <stdio.h>
 
void ab( int a[], size_t tam );
 
int main( void ){
	int a[] = {5, 3, 8, 99, 11};
	size_t tam = 5;
 
	printf( "\n \"a\" antes de la llamada a la funcion vale........:%d", a[0] );
	ab(a, tam);
	printf( "\n \"a\" despues de la llamada a la funcion vale......:%d\n\n", a[0] );
 
 
}
 
void ab( int a[], size_t tam ){
	a[0] = 1;
}
 

	int *ptr = (int*)malloc(MAX * sizeof(int)+1);
 

	int *ptr = (int*)malloc((MAX+1) * sizeof(int));

#include <stdio.h>
#include <stdlib.h>
 
#define MAX 150	
#define TABLA 5
 
int main( void ){
	size_t i=1;
	int *ptr = (int*)malloc(MAX * sizeof(int));
 
	while( i<=MAX ){
		ptr[i] = i*TABLA;
		printf( "\n %2lu x %d = %2d", i, TABLA, ptr[i] );
		i++;
	}
 
	free(ptr);
 
	return 0;
}

#define MAX 150	
#define TABLA 5
 

int *ptr = (int*)malloc(MAX * sizeof(int));

#include <stdio.h>
#include <stdlib.h>
 
#define MAX 15
#define TABLA 3
 
int main( void ){
	size_t i=1;
	int *ptr = malloc(MAX * sizeof(int));
 
	while( i<=MAX ){
		ptr[i] = i*TABLA;
		printf( "\n %2lu x %d = %2d", i, TABLA, ptr[i] );
		i++;
	}
 
	free(ptr);
 
	return 0;
}
 

       ......................
        V =  (float *) malloc(N * sizeof(float));
	do {
		V = (float*) realloc( V, (N+1)*sizeof(float) );
        .........................

#include <stdio.h>
#include <stdlib.h>
 
int main( void ){
	float *V=NULL;
	int N=0,i,ch;
	char c;
 
	do {
		V=( float *)realloc((float *)V,(N+1)*sizeof(float));
		printf("\n Ingresa un numero real.................: ");
		scanf("%f", &V[N]);
		while((ch = getchar()) !='\n' && ch!=EOF);
		printf("\n Quieres introducir otro valor? (S/N)...: ");
		c=getchar();
		N++;
	}while (c=='s' || c=='S');
 
	for(i=0;i<N;i++)
		printf("\n El valor %d es igual a..................: %f\n", i, V[i]);
 
	free(V);
 
	return 0;
}

     V=( float *)realloc((float *)V,(N+1)*sizeof(float));