Simple pointer
/*********************************************************/
/* pointer1.cpp - VC6.0 */
/* Simple pointer */
/* J Luo, 18-Mar-2001 */
/*********************************************************/
#include<stdio.h>
void main()
{
int a;
int *p;
printf("a=");
scanf("%d", &a);
printf("a=%d\n", a);
p = &a;
printf("*p=%d\n", *p);
printf("p=%x\n", p);
printf("&p=%x\n", &p);
p = p + 1;
printf("p=%x\n", ++p);
}
String with array
/*********************************************************/
/* strings.cpp - VC5.0 */
/* Using array and pointer for string */
/* J Luo, 23-May-2001 */
/*********************************************************/
#include <stdio.h>
#include <string.h>
void main()
{
char a[][4] = {"CAT", "RAT", "DOG", "PIG", "FOX", "COW"};
int n = sizeof(a) / sizeof(a[0]);
for (int i=0; i<n; i++) {
for (int j=0; j<4; j++) {
printf("%x ", &a[i][j]);
printf("%c\t", a[i][j]);
}
printf("\n");
}
}
Output
12ff68 C 12ff69 A 12ff6a T 12ff6b
12ff6c R 12ff6d A 12ff6e T 12ff6f
12ff70 D 12ff71 O 12ff72 G 12ff73
12ff74 P 12ff75 I 12ff76 G 12ff77
12ff78 F 12ff79 O 12ff7a X 12ff7b
12ff7c C 12ff7d O 12ff7e W 12ff7f
3D array
/*********************************************************/
/* strings.cpp - VC5.0 */
/* Using array and pointer for string */
/* J Luo, 23-May-2001 */
/*********************************************************/
#include <stdio.h>
#include <string.h>
void main()
{
char a[][3][4] = {"CAT", "RAT", "DOG", "PIG", "FOX", "COW"};
int n = sizeof(a) / sizeof(a[0]);
for (int i=0; i<n; i++) {
for (int j=0; j<3; j++) {
for (int k=0; k<4; k++) {
printf("%x ", &a[i][j][k]);
printf("%c\t", a[i][j][k]);
}
printf("\n");
}
printf("\n");
}
}
Output
12ff68 C 12ff69 A 12ff6a T 12ff6b
12ff6c R 12ff6d A 12ff6e T 12ff6f
12ff70 D 12ff71 O 12ff72 G 12ff73
12ff74 P 12ff75 I 12ff76 G 12ff77
12ff78 F 12ff79 O 12ff7a X 12ff7b
12ff7c C 12ff7d O 12ff7e W 12ff7f
2D array with pointer
/*********************************************************/
/* strings.cpp - VC5.0 */
/* Using array and pointer for string */
/* J Luo, 23-May-2001 */
/*********************************************************/
#include <stdio.h>
#include <string.h>
void main()
{
char *a[][4] = { {"CAT", "RAT", "DOG"}, {"PIG", "FOX", "COW"} };
int n = sizeof(a) / sizeof(a[0]);
for (int i=0; i<n; i++) {
for (int j=0; j<3; j++) {
for (int k=0; k<4; k++) {
printf("%x ", &a[i][j][k]);
printf("%c\t", a[i][j][k]);
}
printf("\n");
}
printf("\n");
}
}
2D array with pointer
/*********************************************************/
/* strings.cpp - VC5.0 */
/* Using array and pointer for string */
/* J Luo, 23-May-2001 */
/*********************************************************/
#include <stdio.h>
#include <string.h>
void main()
{
char *a[][4] = { {"CAT", "RAT", "DOG"}, {"PIG", "FOX", "COW"} };
int n = sizeof(a) / sizeof(a[0]);
for (int i=0; i<n; i++) {
for (int j=0; j<3; j++) {
printf("%x ", a[i][j]);
printf("%s\t", a[i][j]);
}
printf("\n");
}
}