XO-01

#include<stdio.h>
#include<string.h>
#include <stdlib.h>
#include<malloc.h>
struct employee {
  char name[128];
  float salary;
};

typedef struct employee Employee;

int main(){
    int n = 3;
    Employee i[3];
    strcpy(i[0].name, "Jonh Doe");
    i[0].salary = 3000.0;
    strcpy(i[1].name, "Mark Ken");
    i[1].salary = 2300.0;
    strcpy(i[2].name, "Sucy Merc");
    i[2].salary = 2000.0;
    FILE *fp = fopen("D:\\employee.bin","w+b");
    fwrite(&n, sizeof(int),1,fp);
    fwrite(i, sizeof(Employee), 3, fp);
    fclose(fp);
    return 0;
}