hqs_wyx_student_management/8.c

#include<stdio.h>
#include<string.h> 
#define N 100

struct stu_info
{
	char num[20];
	char cls[20];
	char name[20];
	float math,physics,english,total;
};

struct stu_info stu[N];
int top=0;

void print_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 print()
{
	int i;
	for(i=0;i<top;i++) printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].math,stu[i].physics,stu[i].english,stu[i].total);
}

void input()
{
	char op[20];
	while(1)
	{
		printf("Id ");
		scanf("%s",stu[top].num);
		printf("class ");
		scanf("%s",&stu[top].cls);
		printf("name ");
		scanf("%s",stu[top].name);
		printf("score1 ");
		scanf("%f",&stu[top].math);
		printf("score2 ");
		scanf("%f",&stu[top].physics);
		printf("score3 ");
		scanf("%f",&stu[top].english);
		stu[top].total=stu[top].math+stu[top].physics+stu[top].english;
		top++;
		printf("continue?\n");
		do{
			scanf("%s",op);
		}while(strcmp(op,"yes")!=0&&strcmp(op,"no")!=0);
		if(strcmp(op,"no")==0) return;
	}
}

void del()
{
	int i,d;
	char key[20],op[20];
	while(1)
	{
		i=0,d=0;
		scanf("%s",key);
		while(i<top)
		{
			if(strcmp((stu+i)->num,key)==0||strcmp((stu+i)->name,key)==0)
			{
				d++;top--;
				*(stu+i)=*(stu+i+d);
			}
			else
			{
				*(stu+i)=*(stu+i+d);
				i++;
			}
		}
		print();
		printf("continue?\n");
		do{
			scanf("%s",op);
		}while(strcmp(op,"yes")!=0&&strcmp(op,"no")!=0);
		if(strcmp(op,"no")==0) return;
	}
}

void select()
{
	int i,flag;
	char key[20],op[20];
	while(1)
	{
		flag=0;
		scanf("%s",key);
		for(i=0;i<top;i++)
		{
			if(strcmp((stu+i)->num,key)==0||strcmp((stu+i)->cls,key)==0)
			{
				flag=1;
				printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].math,stu[i].physics,stu[i].english,stu[i].total);
			}
		}
		if(!flag)
		{
			printf("there is no eligible student\n");
			return;
		}
		printf("continue?\n");
		do{
			scanf("%s",op);
		}while(strcmp(op,"yes")!=0&&strcmp(op,"no")!=0);
		if(strcmp(op,"no")==0) return;
	}
}

void order()
{
	int i,j;
	struct stu_info tmp;
	for(i=0;i<top;i++)
	{
		for(j=0;j<top-i-1;j++)
		{
			if(strcmp((stu+j)->cls,(stu+j+1)->cls)==1||strcmp((stu+j)->cls,(stu+j+1)->cls)==0&&((stu+j)->total<(stu+j+1)->total))
			{
				tmp = *(stu+j);
				*(stu+j) = *(stu+j+1);
				*(stu+j+1) = tmp;
			} 
		}
	}
	print();
	return;
}

int main()
{
	int op;
	while(1)
	{
		print_menu();
		scanf("%d",&op);
		switch(op)
		{
			case(1):
				input();
				break;
			case(2):
				del();
				break;
			case(3):
				select();
				break;
			case(4):
				order();
				break;
			case(5):
				print();
				break;
			case(6):
				return 0;
		}
	}
}