#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct Student{
	char *id;
	int cl;
	char *name;
	float score1;
    float score2;
    float score3;
    float total_score;
}Student;
void mainmenu(){
	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 inputStudentinfo(Student *students,int *size){
	printf("Id ");
    students[*size].id=(char *)malloc(sizeof(char)*10);
    scanf("%s",students[*size].id);
    printf("class ");
    scanf("%d",&students[*size].cl);
    printf("name ");
    students[*size].name=(char *)malloc(sizeof(char)*10);
    scanf("%s",students[*size].name);
    printf("score1 ");
    scanf("%f",&students[*size].score1);
    printf("score2 ");
    scanf("%f",&students[*size].score2);
    printf("score3 ");
    scanf("%f",&students[*size].score3);
    (*size)++;
}
void deleteinfo(Student* students, int* size) {
    char id[10];
    scanf("%s",id);
    int i;
    for (i=0;i<*size;++i) {
    	if (strcmp(students[i].id,id) == 0) {
            free(students[i].id);
            free(students[i].name);
            students[i]=students[--(*size)];
            return;
        }
    }
}
void select(Student* students,int size){
    char id[10];
    scanf("%s",id);
    int i;
    for (i=0;i<size;++i){
        if(strcmp(students[i].id,id)==0){
            printf("%s %d %s %.2f %.2f %.2f\n", students[i].id, students[i].cl, students[i].name, students[i].score1, students[i].score2, students[i].score3);
            return;
        }
    }
}
void sort(Student* students,int size) {
    int i,j;
    for(i=0;i<size - 1;++i) {
        for(j=0;j<size-1-i;++j) {
            if(students[j].cl>students[j + 1].cl){
                Student temp=students[j];
                students[j]=students[j + 1];
                students[j + 1]=temp;
            }
        }
    }
}
void output(Student* students,int size){
    int i;
    for(i=0;i<size;++i) {
        printf("%s %d %s %.2f %.2f %.2f\n", students[i].id, students[i].cl, students[i].name, students[i].score1, students[i].score2, students[i].score3);
    }
}
int main(){
	Student students[100];
    int size=0;
    int option;
    int lastop=-1;
    char continueFlag[10];
    int runflag=1;
    while(runflag){
    	mainmenu();
        if(lastop==-1){
        	scanf("%d",&option);
		}else{
			option=lastop;
		}
		do{
			switch (option) {
        	case 1:
            	inputStudentinfo(students,&size);
            	break;
        	case 2:
            	deleteinfo(students,&size);
            	break;
        	case 3:
            	select(students,size);
            	break;
        	case 4:
            	sort(students,size);
            	break;
        	case 5:
            	output(students,size);
            	break;
        	case 6:
            	runflag=0;  
                break;
        	}
        	if(runflag){
        		printf("continue?\n");
            	scanf("%s", continueFlag);
            	if(strcmp(continueFlag,"yes")==0){
    				lastop=option;
				}else{
					lastop=-1;
				}
			} 
        	
			
            
		}while(strcmp(continueFlag,"yes")==0&&runflag); 
	}
	return 0;
}