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师兄帮帮忙 UVa12412 一个简单的成绩查询问题

程序员文章站 2024-03-20 09:45:58
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师兄帮帮忙 UVa12412

题目要求

请自行查阅。

代码部分

用线性结构实现。

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <ctype.h>
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
typedef struct
{
	int chinese;
	int math;
	int english;
	int programming;
	int rank;
	int sum;
	float average;
}GRADE;
typedef struct SPMS
{
	char SID[15];
	char CID[25];
	char name[15];
	GRADE grade;
	bool operator<(const SPMS &s2) const
	{
		if(grade.sum >= s2.grade.sum)
			return true;
		else 
			return false;
	}
}SPMS;
typedef struct
{
	int studentnumber=0;
	int classnumber=0;
}informs;
vector<SPMS> stu(105);
informs info;
void Add()
{
	printf("Please enter the SID,CID,name and four sorces.Enter 0 to finishi.\n");
	int chinese,math,english,programming;
	int i,j,k;
	char sid[15],cid[25],n[15];
	char flag[2]="0";
	while(scanf("%s",sid)&&strcmp(sid,flag))
	{
		scanf("%s%s%d%d%d%d",cid,n,&chinese,&math,&english,&programming);
		for(i=0;i<info.studentnumber;i++)
		{
			if(strcmp(sid,stu[i].SID)==0)
			{
				printf("Duplicated SID.\n");
				break;
			}
		}
		if(i==info.studentnumber)
		{
			strcpy(stu[info.studentnumber].SID,sid);
			strcpy(stu[info.studentnumber].CID,cid);
			strcpy(stu[info.studentnumber].name,n);
			stu[info.studentnumber].grade.chinese=chinese;
			stu[info.studentnumber].grade.english=english;
			stu[info.studentnumber].grade.math=math;
			stu[info.studentnumber].grade.programming=programming;
			stu[info.studentnumber].grade.sum=chinese+english+math+programming;
			stu[info.studentnumber].grade.average=stu[info.studentnumber].grade.sum/4.0;
			info.studentnumber++;
		}	
	}
	sort(stu.begin(),stu.begin()+info.studentnumber);//注意：不要错写成到stu.end()，会死循环！！ 
}
void Remove()
{
	printf("Please enter SID or name.Enter 0 to finish.\n");
	int i,j,k;
	char ch[15];
	char flag[2]="0";
	while(scanf("%s",ch)&&strcmp(ch,flag))
	{
		int count=0;
		for(i=0;i<info.studentnumber;i++)
		{
			if(strcmp(stu[i].SID,ch)==0||strcmp(stu[i].name,ch)==0)
			{
				stu[i].grade.sum=-1;//表示这个人被删除 
				count++;
			}
		}
		if(count>1)
			printf("%s student removed.\n",ch);
		else if(count==1) printf("%s students removed.\n",ch);
		else printf("This student does not exist.\n");
 		sort(stu.begin(),stu.begin()+info.studentnumber);//-1被删除的学生被排在最后，就可以下次继续使用该空间了 
 		info.studentnumber=info.studentnumber-count;
	}
}
void Query()
{
	printf("Please enter SID or name.Enter 0 to finish.\n");
	int i,j,k;
	char ch[15];
	char flag[2]="0";
	while(scanf("%s",ch)&&strcmp(ch,flag))
	{
		int count=0,flag=0;
		for(i=0;i<info.studentnumber;i++)
		{
			if(strcmp(stu[i].SID,ch)==0||strcmp(stu[i].name,ch)==0)
			{
				count++;
				if(count==1)
					printf("SID\tCID\tName\tGrade Ranked\tTotal Points\tAverage Score\n");
				if((i-1>=0)&&(stu[i].grade.sum==stu[i-1].grade.sum))
				{
					flag++;
					printf("%s\t%s\t%s\t\t%d\t\t%d\t\t%.2f\n",stu[i].SID,stu[i].CID,stu[i].name,i+1-flag,stu[i].grade.sum,stu[i].grade.average);					
				}
				else
				{
					flag=0;
					printf("%s\t%s\t%s\t\t%d\t\t%d\t\t%.2f\n",stu[i].SID,stu[i].CID,stu[i].name,i+1,stu[i].grade.sum,stu[i].grade.average);
				}	
			}
		}
	}	
}
void ShowStatistics_allgrade()
{
		int i,j,k;
		int chinesegrade=0,mathgrade=0,englishgrade=0,programminggrade=0;
		int count1f=0,count2f=0,count3f=0,count4f=0;
		int count_p[4]={0};
		for(i=0;i<info.studentnumber;i++)
		{
			int countp=0;//统计该学生通过考试的数目 
			//统计成绩 
			chinesegrade+=stu[i].grade.chinese;
			mathgrade+=stu[i].grade.math;
			englishgrade+=stu[i].grade.english;
			programminggrade+=stu[i].grade.programming;
			//统计挂科数和通过数 
			if(stu[i].grade.chinese<60) count1f++;
			else countp++;
			if(stu[i].grade.math<60) count2f++;
			else countp++;
			if(stu[i].grade.english<60) count3f++;
			else countp++;
			if(stu[i].grade.programming<60) count4f++;
			else countp++;
			count_p[countp]++;
		}
		//打印结果 
		printf("Chinese\n");
		printf("Average Score:%.2f\n",chinesegrade/(float)info.studentnumber);
		printf("Number of passed students:%d\n",info.studentnumber-count1f);
		printf("Number of failed students:%d\n",count1f);
		printf("Mathematics\n");
		printf("Average Score:%.2f\n",mathgrade/(float)info.studentnumber);
		printf("Number of passed students:%d\n",info.studentnumber-count2f);
		printf("Number of failed students:%d\n",count2f);
		printf("English\n");
		printf("Average Score:%.2f\n",englishgrade/(float)info.studentnumber);
		printf("Number of passed students:%d\n",info.studentnumber-count3f);
		printf("Number of failed students:%d\n",count3f);
		printf("Programming\n");
		printf("Average Score:%.2f\n",programminggrade/(float)info.studentnumber);
		printf("Number of passed students:%d\n",info.studentnumber-count4f);
		printf("Number of failed students:%d\n",count4f);
		
		printf("Overall:\n");
		printf("Number of students who passed all subjects:%d\n",count_p[4]);						
		for(j=3;j>=1;j--)
		{
			printf("Number of students who passed 3 subjects:%d\n",count_p[j]);
		}
		printf("Number of students who failed all subjects:%d\n",count_p[0]);	
}
void ShowStatistics()
{
	printf("Please enter class ID,0 for the whole statistics.\n");
	char id[15];
	char flag[2]="0";
	scanf("%s",id);
	int i,j,k;
	if(strcmp(id,flag))//非全年级 
	{
		int count=0;//人数
		int chinesegrade=0,mathgrade=0,englishgrade=0,programminggrade=0;
		int count1f=0,count2f=0,count3f=0,count4f=0;
		int count_p[4]={0};
		for(i=0;i<info.studentnumber;i++)
		{
			int countp=0;//统计该学生通过考试的数目 
			if(strcmp(id,stu[i].CID)==0)
			{
				count++;//该班级人数加 1 
				//统计成绩 
				chinesegrade+=stu[i].grade.chinese;
				mathgrade+=stu[i].grade.math;
				englishgrade+=stu[i].grade.english;
				programminggrade+=stu[i].grade.programming;
				//统计挂科数和通过数 
				if(stu[i].grade.chinese<60) count1f++;
				else countp++;
				if(stu[i].grade.math<60) count2f++;
				else countp++;
				if(stu[i].grade.english<60) count3f++;
				else countp++;
				if(stu[i].grade.programming<60) count4f++;
				else countp++;
				count_p[countp]++;
			}
		}
		//打印结果 
		printf("Chinese\n");
		printf("Average Score:%.2f\n",chinesegrade/(float)count);
		printf("Number of passed students:%d\n",count-count1f);
		printf("Number of failed students:%d\n",count1f);
		printf("Mathematics\n");
		printf("Average Score:%.2f\n",mathgrade/(float)count);
		printf("Number of passed students:%d\n",count-count2f);
		printf("Number of failed students:%d\n",count2f);
		printf("English\n");
		printf("Average Score:%.2f\n",englishgrade/(float)count);
		printf("Number of passed students:%d\n",count-count3f);
		printf("Number of failed students:%d\n",count3f);
		printf("Programming\n");
		printf("Average Score:%.2f\n",programminggrade/(float)count);
		printf("Number of passed students:%d\n",count-count4f);
		printf("Number of failed students:%d\n",count4f);
		
		printf("Overall:\n");
		printf("Number of students who passed all subjects:%d\n",count_p[4]);						
		for(j=3;j>=1;j--)
		{
			printf("Number of students who passed 3 subjects:%d\n",count_p[j]);
		}
		printf("Number of students who failed all subjects:%d\n",count_p[0]);		
	}
	else
		ShowStatistics_allgrade();
}
void PrintNemu()
{
	printf("Welcome to Student Performance Management System(SPMS).\n\n");
	printf("1 - Add\n");
	printf("2 - Remove\n");
	printf("3 - Query\n");
	printf("4 - Show ranking\n");
	printf("5 - Show Statistics\n");
	printf("0 - Exit\n");	
}
int main()
{
	int choice;
	PrintNemu();
	while((scanf("%d",&choice)==1)&&choice)
	{
		if(choice==1) Add();
		else if(choice==2) Remove();
		else if(choice==3) Query();
		else if(choice==4)
		{
			printf("Showing the ranklist hurts students' self-esteem.Don't do that\n");
		}
		else if(choice==5) ShowStatistics();
		PrintNemu();
	}
	return 0;
}

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