qfedu-c-level/day14/d13.c

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2023-07-21 00:58:46 +08:00
// 自定义二进制文件写入
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct
{
int sid;
char name[32];
int age;
char sex[4];
} STU;
int main()
{
STU s1 = {1, "disen", 20, ""};
STU s2 = {2, "jack", 18, ""};
STU *s3 = malloc(sizeof(STU));
s3->sid = 3;
strcpy(s3->name, "lily");
s3->age = 19;
strcpy(s3->sex, "");
FILE *f = fopen("d13.txt", "wb");
if (NULL == f)
{
return 1;
}
fwrite(&s1, sizeof(STU), 1, f);
fwrite(&s2, sizeof(STU), 1, f);
fwrite(&s3, sizeof(STU), 1, f);
fclose(f);
return 0;
}