二周 项目2 有序的结构体数组

/*
烟台大学计算机学院学生
*All rights reserved.
*文件名称:
*作者：zhaojiaxiang
*完成日期：2013年3月4日
*版本号：v1.0
*我的程序：
*/
#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
struct Student
{
char num[13];
char name[10];
int cpp;
int math;
int english;
int grade;
double average;
};
void calculate(Student s[],int n);  //计算总分和均分，数据在s数组中，共有n个元素
void sort1(Student [],int);      //按总分降序排序
void sort2(Student [],int);      //按学号升序排序
void output(Student [],int);     //输出成绩单
void outputExcellent(Student [],int);  //输出优秀者：总分超285，单科不低于90
int main()
{
Student stu[]= {{"201152501104","Tom",65,69 ,68 },
{"201152501114","Jeery",94 ,89 ,63 },
{"201152501138","Speike",67 ,62 ,84 },
{"201152501204","Tyke",100 ,95 ,91 },
{"201152501202","Tuffy",59 ,80 ,55 },
{"201152501115","Butch",100 ,99 ,89 },
{"201152501201","Lightning",95 ,92 ,99 },
{"201152501145","Topsy",88 ,56 ,67 },
{"201152501203","Droopy",62 ,62 ,95 },
{"201152501140","Drupa",80 ,60 ,86 },
{"201152501205","Buzz",73 ,90 ,94}
};
int stuNum=sizeof(stu)/sizeof(stu[0]);  //用sizeof运算确定数组中元素个数
//计算总分和均分后输出
calculate(stu,stuNum);
cout<<"下面是成绩单:"<<endl;
output(stu,stuNum);
cout<<"优秀者名单:"<<endl;
outputExcellent(stu,stuNum);
//按总分降序排序后输出
sort1(stu,stuNum);
cout<<"按总分降序排序后:"<<endl;
output(stu,stuNum);
//按学号升序排序后输出
sort2(stu,stuNum);
cout<<"按学号升序排序后:"<<endl;
output(stu,stuNum);
return 0;
}
void calculate(Student s[],int n)
{
for(int i=0; i<n; i++)
{
s[i].grade=s[i].cpp+s[i].math+s[i].english;
s[i].average=s[i].grade/3;
}
}
void sort1(Student s[],int n)
{
int i,j;
Student t;
for(i=0; i<n; i++)
{
for(j=0; j<n-i-1; j++)
{
if(s[j].grade<s[j+1].grade)
{
t=s[j];
s[j]=s[j+1];
s[j+1]=t;
}
}
}
}
void sort2(Student s[],int n)
{
int i,j;
Student t;
for(i=0; i<n-1; i++)
{
for(j=i+1; j<n; j++)
{
if(strcmp(s[i].num,s[j].num)>0)
{
t=s[i];
s[i]=s[j];
s[j]=t;
}
}
}
}
void output(Student s[],int n)
{
cout<<"学号   姓名  C++ 高数 英语  总分  均分："<<endl;
for(int i=0; i<n; i++)
{
cout<<s[i].num<<" "<<s[i].name<<" "<<s[i].cpp<<" "<<s[i].math<<" "<<s[i].english<<" "<<s[i].grade<<" "<<s[i].average<<" "<<endl;
}
}
void outputExcellent(Student s[],int n)
{
for(int i=0;i<n;i++)
{
if(s[i].grade>285&&s[i].cpp>90&&s[i].math>90&&s[i].english>90)
cout<<s[i].name<<endl;
}
}