Câu hỏi: PRF192 - Phần 5: Con trỏ

#include<stdio.h>
void increment(int *ptr) {
    (*ptr)++;
}
int main(){
        int x=1005;
        increment(&x);
        printf("%d ",x);
}

int a[5] = {1, 2, 3, 4, 5};
printf("%d", a);

#include <stdio.h>
void swap(int a, int *b) {
    int temp = a;
    a = *b;
    *b = temp;
}
int main() {
    int x = 5;
    int y = 10;
    swap(x, y);
    printf("x = %d, y = %d\n", x, y);
    return 0;
}

int main() {
    int *p = NULL;
    printf("%d",p);
    getchar();
    return 0;
}

int main()
{
        int i = 100;
        int *p = &i;
        *p +=2;
        printf("%d, %d", i, *p);
        getchar();
        return 0;
}

int a = 5, b = 7;
int *pa = &a, *pb = &b;
*pa = *pa + *pb;

int arr[] = {1, 2, 3, 4};
printf("%d", *(arr + 2));

#include <stdio.h>
void swap(int *px, int *py)
{
    int z;
    z=*px;
    *px=*py ;
    *py=z ;
}
int main()
{
    int a=15, b=21 ;
    swap(&a,&b);
    printf ("%d  %d",a,b);
   return 0;
}

void main()
{
        int const *p = 5;
        printf("%d", ++(*p));
        getchar();
}

#include <stdio.h>

int main()
{
    int a = 4;
    int *b = &a;

    a -= 1;
    *b -= 1;
    printf("%d %d", a, *b);

    return 0;
}

void input(int* a, int n);

#include<stdio.h>
void updatePosition(int *time, float* position, float v)
{
    if ((*position < 5) && (*position > -5))
        *position += v;
    else
        *position += -0.1*(*position);
    time += 1;
}

main()
{
    float p = 4.0, v = 1;
    int t = 0;
    printf("t = %d, p = %f\n", t, p);
    updatePosition(&t, &p, v);
    updatePosition(&t, &p, v);
    printf("t = %d, p = %f\n", t, p);
}

void swap(int *a, int *b) {
    int t = *a;
    *a = *b;
    *b = t;
}

int main() {
    int x = 5, y = 10;
    swap(&x, &y);
    printf("%d %d", x, y);
    return 0;
}