zhangbaozhe2/第8问.cpp

#include<stdio.h>
#include<string.h>
struct student
{
	char id[20];
	char name[20];
	char clas[20];
	double Math;
	double Physic;
	double English;
	double sum;
}s[20];
int T=0;
void menu()
{
	printf("1.input\n");
	printf("2.delete\n");
	printf("3.select\n");
	printf("4.order\n");
	printf("5.output\n");
	printf("6.quit\n");
	printf("please input your option\n");
}
void inputstudent(struct student *t)
{
	printf("Id ");
	scanf("%s",&(t->id));
	printf("class  ");
	scanf("%s",&(t->clas));
	printf("name ");
	scanf("%s",&(t->name));
	printf("score1 ");
	scanf("%lf",&(t->Math));
	printf("score2 ");
	scanf("%lf",&(t->Physic));
	printf("score3 ");
	scanf("%lf",&(t->English));
	t->sum=t->Math+t->Physic+t->English;
	T++;
}
void outputstudent(struct student *t)
{
	printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n",t->id,t->clas,t->name,t->Math,t->Physic,t->English,t->sum);
}
void deletestudent(struct student *t)
{
	char de[10];
	scanf("%s",de);
	int i=0;
	while(i<T)
	{
		if(strcmp((t+i)->id,de)==0||strcmp((t+i)->name,de)==0)
		{
			for(int j=i;j<T-1;j++)
			{
				*(t+j)=*(t+j+1);
			}
			i--;
			T--;
		}
		i++;
	}
	printf("\n");
	for(int m=0;m<T;m++)
	outputstudent((t+m));
}
void findstudent(struct student *t)
{
	char f[10];
	scanf("%s",f);
	int p=0;
	for(int i=0;i<T;i++)
	{
		if(strcmp((t+i)->id,f)==0||strcmp((t+i)->clas,f)==0)
		{
			outputstudent((t+i));
			p=1;
		}
		if(i==T-1&&p==0)
		printf("there is no eligible student\n");
	}
}
void orderstudent(struct student *t)
{
	for(int i=0;i<T;i++)
	{
		for(int j=i;j<T;j++)
		{
			if(strlen((t+i)->clas)>strlen((t+j)->clas))
			{
				struct student o;
				o=*(t+i);
				*(t+i)=*(t+j);
				*(t+j)=o;
			}
		}
	}
	for(int i=0;i<T;i++)
	{
		for(int j=i;j<T;j++)
		{
			if(strlen((t+i)->clas)==strlen((t+j)->clas)&&strcmp((t+i)->clas,(t+j)->clas)>0)
			{
				struct student o;
				o=*(t+i);
				*(t+i)=*(t+j);
				*(t+j)=o;
			}
		}
	}
	for(int i=0;i<T;i++)
	{
		for(int j=i;j<T;j++)
		{
			if(strcmp((t+i)->clas,(t+j)->clas)==0&&(t+i)->sum<(t+j)->sum)
			{
				struct student o;
				o=*(t+i);
				*(t+i)=*(t+j);
				*(t+j)=o;
			}
		}
	}
}
int main()
{
	menu();
	int OS;
	flag1:
	scanf("%d",&OS);
	if(OS==1)
	{
		flag2:
		inputstudent(&s[T]);
		printf("continue?\n");
		char p[10];
		scanf("%s",p);
		if(p[0]=='y')
		{
			goto flag2;
		}
		else
		{
			menu();
			goto flag1;
		}
	}
	if(OS==2)
	{
		flag3:
		deletestudent(&s[0]);
		printf("continue?\n");
		char p2[10];
		scanf("%s",p2);
		if(p2[0]=='y')
		{
			goto flag3;
		}
		else
		{
			menu();
			goto flag1;
		}
	}
	if(OS==3)
	{
		flag4:
		findstudent(&s[0]);
		printf("continue?\n");
		char p3[10];
		scanf("%s",p3);
		if(p3[0]=='y')
		{
			goto flag4;
		}
		else
		{
			menu();
			goto flag1;
		}
	}
	if(OS==4)
	{
		orderstudent(&s[0]);
		printf("\n");
		for(int i=0;i<T;i++)
		outputstudent(&s[i]);
		printf("\n");
		menu();
		goto flag1;
	}
	if(OS==5)
	{
		printf("\n");
		for(int i=0;i<T;i++)
		outputstudent(&s[i]);
		printf("\n");
		menu();
		goto flag1;
	}
	if(OS==6)
	{
		printf("\nquit\n");
	}
	return 0;
}