練習(xí)31 使用指針進(jìn)行簡單操作

//使用指針來進(jìn)行簡單操作

#include"stdio.h"

void f_p(int *p1, int *p2){    *p1 = 20;    *p2 = 21;}

int main(){    int a, b;    int *pointer_1, *pointer_2;    a = 100; b = 10;    pointer_1 = &a;    pointer_2 = &b;    printf("%d,%d\n", a, b);    printf("%d,%d\n", *pointer_1, *pointer_2);    //輸出指針地址    printf("%d,%d\n", pointer_1, pointer_2);

    a = 1;    //若改變a的值,則指向a的指針同步改變    printf("\n改變a的值 a = 1\n");    printf("%d,%d\n", a, b);    printf("%d,%d\n", *pointer_1, *pointer_2);    printf("%d,%d\n", pointer_1, pointer_2);

    f_p(pointer_1, pointer_2);    //若通過函數(shù)改變指針的值，則同步改變a、b的值    printf("\n指針變量作為函數(shù)參數(shù)\n");    printf("%d,%d\n", a, b);    printf("%d,%d\n", *pointer_1, *pointer_2);    printf("%d,%d\n", pointer_1, pointer_2);

    return 0;}