/*
 * pointers2.c
 *
 *  Created on: Mar 14, 2014
 *      Author: carola
 */
#include <stdio.h>

void swap_attempt(int a, int b){
	/* Does change values outside of function, because variables are passed by value */
	int tmp=a;
	a=b;
	b=tmp;
	printf("a=%d at address %d\n",a, &a);
	printf("b=%d at address %d\n",b, &b);
	printf("tmp=%d at address %d\n",tmp, &tmp);
}

void swap(int* a, int* b){
	int tmp = *a; // content of pointer-variable
	printf("\n\na=%d, *a=%d, &a=%d\n\n\n", a, *a, &a);

	*a=*b;
	*b=tmp;


}

int main(){
	int i=5;
	int j=7;
	int k=8;
	printf("i=%d at address %d\n",i, &i);
	printf("j=%d at address %d\n",j, &j);
	printf("k=%d at address %d\n",k, &k);

	swap_attempt(i,j);
	swap(&i,&j);
	printf("i=%d at address %d\n",i, &i);
	printf("j=%d at address %d\n",j, &j);
	printf("k=%d at address %d\n\n\n",k, &k);

	//int f = 2665484;
	//printf("*f=%d\n",(int)*f);

	int A[4]={0,1,2,3};
	int l;
	for(l=0; l<4; l++)
		printf("A[%d]=%d; address=%d\n", l, A[l], &A[l]);

	printf("\n\n\n");
	int* jp=&j;
	jp[1]=57;
	*(jp+2)=-32;
	printf("i=%d at address %d\n",i, &i);
	printf("j=%d at address %d\n",j, &j);
	printf("k=%d at address %d\n\n\n",k, &k);
	//*(jp-1)=42;

	return 0;
}