management30/3.c

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

void input(){
    int i,j;
	for(i=0;i<3;i++){
		scanf("%s%lf%lf%lf",s[i].id,&s[i].score1,&s[i].score2,&s[i].score3);
		s[i].total=s[i].score1+s[i].score2+s[i].score3;
		s[i].aver=s[i].total/3;
	}
	for(i=0;i<2;i++){
		for(j=0;j<2;j++){
			if(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<3;i++){
		printf("%s,%.1f,%.1f\n",s[i].id,s[i].total,s[i].aver);
	}
	
}

int main(){
    char c;
    while(1){
        printf("                              1.Input\n");
        printf("                              2.Output\n");
        printf("                              3.Order\n");
        printf("                              4.Quit\n");
        scanf(" %c",&c);
        if(c=='i'){
        	printf("Please input info of the three students:\n");
        	input();
		}
		else if(c=='o') printf("You are trying to Output info\n");
        else if(c=='m') printf("You are trying to Make things ordered\n");
        else if(c=='q'){
        	printf("You are about to Quit\n");
			break;
		}
		else printf("Wrong input\n");
    }
    return 0;
}
//i
//10001
//85.0
//99.0
//77.5
//10002
//88.5
//88.5
//90.0
//10003
//66.0
//78.5
//89.5
//m
//q