RileyKim

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

// int i,k;
// int *ptr;
// int main(){
    
//     while(1){
//         scanf("%d", &i);

RileyKim

	typedef struct {

		volatile *uint8_t** port;

		uint8_t bit;

		uint8_t mode;

	} PortMapType;

RileyKim

struct StructBits8 {

		unsigned b0 : 1;

		unsigned b1 : 1;

		unsigned b2 : 1;

		unsigned b3 : 1;

RileyKim

DDRA |= (1 << DDR2); //DDRA의 2번핀 output

DDRA |= (1 << DDR3); //DDRA의 3번핀 output

PORTA &= ~(1 << PORT2); // PORTA의 2번 핀 1 출력 

PORTA |= (1 << PORT3); // PORTA의 3번 핀 1 출력 

RileyKim

/* multi array pointer example */

#include<stdio.h>

int main(void) {
	int a[3][2] = { {1,2},{3,4},{5,6} };

	printf("a[0] : %d \n", a[0]);
	printf("a[0] : %d \n",*(a+0));

RileyKim

/* multi array pointer example */

#include<stdio.h>

void show_data(int(*ptr)[4], int a);

int main(void) {
	int arr1[2][4] = { 1,2,3,4,5,6,7,8, };
	int arr2[3][4] = { {1}, {2}, {3} };

RileyKim

/* two array pointer example */

#include<stdio.h>


int main(void) {
	int a[3][2] = { 1,2,3,4,5,6 };

	printf("a : %d \n", a);
	printf("a+1 : %d \n", a+1);

RileyKim

/* two array pointer example */

#include<stdio.h>


int main(void) {
	int a[3][2] = { 1,2,3,4,5,6 };

	printf("a[0] : %d \n", a[0]);
	printf("a[1] : %d \n", a[1]);

RileyKim

/* double pointer example */

#include<stdio.h>

void pswap(int** p1, int** p2);

int main(int * pArr, int n) {
	int A = 10, B = 20;
	int* pA, *pB;

RileyKim

/* double pointer example */

#include<stdio.h>

void pswap(int* p1, int* p2);

int main(int * pArr, int n) {
	int A = 10, B = 20;
	int* pA, *pB;