#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct node {
int x;//4:0~3 [4567]
double y;//8:8~15
char ch;//1:16~ [...]
} Node;//24
int main(void)
{
Node first;
Node second;
FILE * wt,*rd;
first.x = 10;
first.y = 0.1;
first.ch = 'a';
{
printf("sizeof(first):%d\nfirst:%x,first.x:%x\nfirst.y offset:%d\nfirst.ch offset:%d\n",
sizeof(first) ,&first, &first.x, (int)&first.y-(int)&first, (int)&first.ch-(int)&first );
}
if ((wt = fopen("temp.bin", "w+b")) == NULL) {
perror("Memory allocate!\n");
exit(EXIT_FAILURE);
}
fwrite(&first, sizeof(Node), 1, wt);
fclose(wt);
if ((rd = fopen("temp.bin", "r+b")) == NULL) {
perror("Memory allocate!\n");
exit(EXIT_FAILURE);
}
fread(&second, sizeof(Node), 1, rd);
printf("%d %f %c\n", second.x, second.y, second.ch);
fclose(rd);
return 0;
}
/*
sizeof(first):24
first:12ff68,first.x:12ff68
first.y offset:8
first.ch offset:16
10 0.100000 a
Press any key to continue
*/
