management30/8.c

#include <stdio.h>
#include <string.h>
int cnt=0;
struct student{
	int clas;
    char id[20],name[20];
    double score1,score2,score3,total;
}s[10];

void input(){
	while(1){
		printf("Id ");
		scanf("%s",s[cnt].id);
		printf("class ");
		scanf("%d",&s[cnt].clas);	
		printf("name ");
		scanf("%s",s[cnt].name);
		printf("score1 ");
		scanf("%lf",&s[cnt].score1);
		printf("score2 ");
		scanf("%lf",&s[cnt].score2);
		printf("score3 ");
		scanf("%lf",&s[cnt].score3);
		s[cnt].total=s[cnt].score1+s[cnt].score2+s[cnt].score3;
		cnt++;
		printf("continue?\n");
		char ans[10];
		scanf("%s",ans);
		if(strcmp(ans,"no")==0) break;
	}
}

void del(){
	while(1){
		char str[20];
		scanf("%s",str);
		int i=find(str);
		if(i!=-1){
			for(;i<cnt-1;i++){
				s[i]=s[i+1];
			}
			cnt--;
		}
		for(i=0;i<cnt;i++) output(i);
		printf("continue?\n");
		char ans[10];
		scanf("%s",ans);
		if(strcmp(ans,"no")==0) break;
	}
}

int find(char str[]){
	int i;
	for(i=0;i<cnt;i++){
		if(strcmp(s[i].id,str)==0||strcmp(s[i].name,str)==0){
			return i;
		}
	}
	return -1;
}

void select(){
	while(1){
		int i,flag=0;
		char str[20];
		scanf("%s",str);
		if(strlen(str)==2){
			int clas=10*(str[0]-'0')+str[1]-'0';
			for(i=0;i<cnt;i++){
				if(s[i].clas==clas){
					flag=1;
					output(i);
				}
			}
		}
		else{
			for(i=0;i<cnt;i++){
				if(strcmp(s[i].id,str)==0){
					flag=1;	
					output(i);	
				}
			}	
		}
		if(!flag) printf("there is no eligible student\n");
		printf("continue?\n");
		char ans[10];
		scanf("%s",ans);
		if(strcmp(ans,"no")==0) break;
	}
}

void order(){
	int i,j;
	for(i=0;i<cnt-1;i++){
		for(j=0;j<cnt-i-1;j++){
			if(s[j].clas>s[j+1].clas||(s[j].clas==s[j+1].clas&&s[j].total<s[j+1].total)){
				struct student t;
				t=s[j];
				s[j]=s[j+1];
				s[j+1]=t;
			}
		}
	}
	for(i=0;i<cnt;i++) output(i);
}

void output(int i){
	printf("%s,%d,%s,%.1f,%.1f,%.1f,%.1f\n",s[i].id,s[i].clas,s[i].name,s[i].score1,s[i].score2,s[i].score3,s[i].total);
}

int main(){
    int opt,i;
    while(1){
        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");
        scanf("%d",&opt);
        if(opt==1) input();
		else if(opt==2) del();
        else if(opt==3) select();
        else if(opt==4) order();
        else if(opt==5){
        	for(i=0;i<cnt;i++) output(i);
		}
		else if(opt==6) break;
    }
    return 0;
}
//1
//1001
//11
//zhang
//99.5
//88.5
//89.5
//yes
//1002
//22
//li
//77.9
//56.5
//87.5
//yes 
//1003
//11
//wang
//92.5
//99.0
//60.5
//no
//2
//1002
//no
//3
//1001
//yes
//11
//no
//1
//1002
//22
//li
//77.9
//56.5
//87.5
//no
//4
//5
//6