C Tutorial/Language/Variable Pointer — различия между версиями
Admin (обсуждение | вклад) м (1 версия: Импорт контента...) |
(нет различий)
|
Текущая версия на 10:32, 25 мая 2010
Output value at the address
#include <stdio.h>
int main(void)
{
int number = 0;
int *pointer = NULL;
number = 10;
pointer = &number;
printf("\npointer"s value: %p", pointer); /* Output the value (an address) */
printf("\nvalue pointed to: %d\n", *pointer); /* Value at the address */
return 0;
}pointer"s value: 9a378
value pointed to: 10
Put values in the memory locations by using pointers
#include <stdio.h>
main(){
int a[5];
int *b;
int *c;
int i;
for(i = 0;i<5;i++){
a[i]=i;
}
for(i = 0;i<5;i++) {
printf("value in array %d\n",a[i]);
}
b=a;
b++;
*b=4;
b++;
*b=6;
b++;
*b=8;
b++;
*b=10;
b++;
*b=12;
printf("after\n\n\n");
for(i = 0;i<5;i++) {
printf("value in array %d\n",a[i]);
}
}value in array 0
value in array 1
value in array 2
value in array 3
value in array 4
after
value in array 0
value in array 4
value in array 6
value in array 8
value in array 10
