typdef定义数组后的初始化 | 计算机内部只知晓地址,类型为上层的高级语义
#include <stdio.h>
typedef int ARR_INT_2[2];
void test(ARR_INT_2 *t)
{
int *t1;
int *t2;
t1 = &(((int*)t)[0]);
t2 = &(((int*)t)[1]);
printf("t1 addr - %p\n", t1);
printf("t2 addr - %p\n", t2);
*t1 = 3;
*t2 = 4;
}
int main()
{
ARR_INT_2 a;
a[0] = 1;
a[1] = 2;
printf("a[0] addr - %p\n", &a[0]);
printf("a[1] addr - %p\n", &a[1]);
test(&a);
printf("a[0] val - %d\n", a[0]);
printf("a[1] val - %d\n", a[1]);
return 0;
}
输出结果:
a[0] addr - 0x7ffc03144fd8
a[1] addr - 0x7ffc03144fdc
t1 addr - 0x7ffc03144fd8
t2 addr - 0x7ffc03144fdc
a[0] val - 3
a[1] val - 4
标签:addr,val,int,typdef,t2,笔记,t1,数组,printf
From: https://www.cnblogs.com/stellarbin/p/17575354.html