题目

解决代码及点评

/*
6.	在文件 worker2.rec 中插入一个新职工的数据，并使插入后仍保持原来的顺序
	（按工资高低顺序插入到原有文件中），然后写入worker3.rec中。
*/
#include <stdio.h>
#include <stdlib.h>

typedef struct Staff_9_6
{
	int num;
	char name[30];
	char sex[5];
	int age;
	float salary;

} Employee;

/*
	读取员工信息
*/
void readStaInfo96(Employee *tempEmp,int fileType)
{
	Employee temp;
	FILE *fp = NULL;
	if (fileType == 2)
	{
		fopen_s(&fp, "worker2.rec","rb");
	}
	else if (fileType == 3)
	{
		fopen_s(&fp, "worker3.rec","rb");
	}
	
	if (fp)
	{
		int i = 0;
		fread(&temp,sizeof(temp),1,fp);
		while(!feof(fp))
		{
			tempEmp[i] = temp;
			printf("num = %d,name = %s,sex = %s,age = %d,salary = %f\n",
					tempEmp[i].num,tempEmp[i].name,tempEmp[i].sex,tempEmp[i].age,tempEmp[i].salary);
			fread(&temp,sizeof(temp),1,fp);
			tempEmp[i] = temp;
			i++;
		}
		fclose(fp);
	}
	else
	{
		printf("open file failed!");
	}
}

/*
	按照工资从高到低排序
*/
void sortEmp96(Employee *emp,int n)
{
	Employee tempEmp;
	for (int i = 0; i < n - 1; i++)
	{
		for (int j = i + 1; j < n; j++)
		{
			if (emp[i].salary < emp[j].salary)
			{
				tempEmp = emp[i];
				emp[i]  = emp[j];
				emp[j]  = tempEmp;
			}
		}
	}
}

/*
	保存员工信息
*/
void saveEmpInfo96(Employee * emp,int n,int fileType)
{
	FILE *fp = NULL;
	if (fileType == 2)
	{
		fopen_s(&fp, "worker2.rec","wb");
	}
	else if (fileType == 3)
	{
		fopen_s(&fp, "worker3.rec","wb");
	}
	if (fp)
	{
		for (int i = 0; i < n; i++)
		{
			fwrite(&emp[i],sizeof(emp[i]),1,fp);
		}
		fclose(fp);
	}
	else
	{
		printf("open file failed!");
	}
}
void main()
{
	const int N  = 11;
	Employee emp[N];
	//readStaInfo(emp,2);
	Employee newEmp;
	printf("请输入第新员工的姓名：\n");
	scanf_s("%s",&(newEmp.name));
	printf("请输入第新员工的性别：\n");
	scanf_s("%s",&(newEmp.sex));
	printf("请输入第新员工的编号：\n");
	scanf_s("%d",&(newEmp.num));
	printf("请输入第新员工的年龄：\n");
	scanf_s("%d",&(newEmp.age));
	printf("请输入第新员工的工资：\n");
	scanf_s("%f",&(newEmp.salary));
	emp[N - 1] = newEmp;
	//sortEmp(emp,N);
	saveEmpInfo96(emp,N,2);
	saveEmpInfo96(emp,N,3);
	readStaInfo96(emp,3);
	system("pause");
}
代码编译以及运行
由于资源上传太多，资源频道经常被锁定无法上传资源，同学们可以打开VS2013自己创建工程，步骤如下：
1）新建工程