Câu hỏi: PRF192 - Phần 5: Con trỏ

#include <stdio.h>
void main()
{
    int *ptr, a = 10;
    ptr = &a;
    *ptr += 1;
    printf("%d,%d\n", *ptr, a);
}

#include <stdio.h>
#include <conio.h>
int main() {
    int n = 267, *pn = &n;
    char* pc = pn;
    *pc = 0;
    printf("n = %d", n);
    return 0;
}

int arr[5] = { 2, 3, 5, 4, 7 };
int *ptr = (&arr + 1);
printf("%d %d\n", *(arr + 1), *(ptr - 1));

int main()
{
        int i = 101;
            int *p = &i;
            printf("%d\n", *p++);
    return 0;
}

#include <stdio.h>
int main() {
    int a[] = {1,2,3,4,5,6};
    int* p = a;
    p += 3;
    printf("%d, %d",*(a+3), *(p++));
    return 0;
}

int main()
{
    int i = 1;
    int *p = &i;
    int **k = &p;
    i+=2;
    printf("%d%d%d", *p, **k, *(*k));
    getchar();
    return 0;
}

double d=9;
double *p = &d;

#include <stdio.h>

int main() {
    int a = 4, *b = &a;
    a--;
    *b=*b-1;
    printf("%d %d", a, *b);
    return 0;
}

void main(){
    int x = 4;
    int *p = &x;
    int *k = p++;
    int r = p - k;
    printf("%d", r);
}

#include <stdio.h>
void main()
{
    int k = 5;
    int *p = &k;
    int **m  = &p;
    **m = 6;
    printf("%d\n", k);
}

#include <stdio.h>
#include <stdlib.h>
int main() {
    int *p = (int*) malloc(sizeof(int));
    *p = 50;
    printf("%d", *p);
    free(p);
    return 0;
}

char temp;
char arr[10] = {1, 2, 3, 4, 5, 6, 7, 8};
temp = (arr + 1)[2];
printf("%d\n", temp);

#include <stdio.h>
void level2(int** ppa)
{
    printf("%d\n", **ppa);
}
void level1(int* pa)
{
    level2(&pa);
}
main()
{
    int a = 10;
    level1(&a);
}

#include <stdio.h>
int main(){
    int a=6,b=15;
    int* ptr1= &a, *ptr2=&b;
    *ptr1 +=12-b+ (*ptr2);
    *ptr2 = b + a- 2*(*ptr1);
    printf("%d, %d, %d", a,b,b+a*3);
}

#include <stdio.h>

int hours_and_minutes2(int total, int *pminutes) {
    return (*pminutes = total % 60, total / 60);
}

int main() {
    int minutes;
    printf("Hours: %d, Minutes: %d\n", hours_and_minutes2(135, &minutes), minutes);
    return 0;
}

int i=4;
int *p = &i;

void func(int *p){
    int j =11;
    *p = j;
}
int main() {
    int i = 1;
    int *p = &i;
    func(p);
    printf("%d,%d", i, *p);
    getchar();
    return 0;
}