Exercise 9-5 address book sorting (20 points)

Input n A friend's information , Including name, 、 Birthday 、 Phone number , This question requires the preparation of procedures , Output the address book in order of age . The title ensures that everyone's birthday is different .

Input format :

Enter the first line to give a positive integer n（<10）. And then n That's ok , Each line follows “ full name Birthday Phone number ” Give a friend's information in the format of , among “ full name ” It's no longer than 10 A string of English letters ,“ Birthday ” yes yyyymmdd Format date ,“ Phone number ” No more than 17 Digit numbers and +、- Composed string .

Output format :

Output your friends' information according to their age , The format is the same as that of output .

sample input :

3
zhang 19850403 13912345678
wang 19821020 [phone]
qian 19840619 13609876543

sample output :

wang 19821020 [phone]
qian 19840619 13609876543
zhang 19850403 13912345678

#include<stdio.h>

struct number{         // Define a structure type 
    char name[10];     // full name 
    long int birth;    // Birthday 
    char tel[20];     // Phone number 
};

int main(){
    int n,i,j;
    struct number s[10],temp;    //s[10] Is to define an array of structures 
    scanf("%d",&n);
    for(i=0;i<n;i++){
        scanf("%s %ld %s ",&s[i].name,&s[i].birth,&s[i].tel);
    }
    
    for(i=0;i<n-1;i++){                  // Structure array sorting , Choose the sorting method 
        for(j=i+1;j<n;j++){
            if(s[i].birth>s[j].birth){
                temp=s[i];
                s[i]=s[j];
                s[j]=temp;
            }
        }
    }
    
    for(i=0;i<n;i++){
         printf("%s %ld %s\n",s[i].name,s[i].birth,s[i].tel);
    }
    
    return 0;
}

summary ：

1、 Definition of structure type ：

struct Structure type name  
{ 
data type Member name 1; 
data type Member name 2; 
...... 
data type Member name n; 
}; 

2、 The definition of structure explains the existence format of variables in the structure , To use this structure, you must specify the variables of the structure type . Structural variable theory The general form of Ming is as follows : 
struct Structure type name Structure variable name ; 

3、 Structure array is a combination of structure and array , The difference from ordinary arrays is that each array element is data of a structure type .

4、 References to structural array element members are made by using array subscripts and structural member operators “.” A combination of ways to achieve , Its general format is ：
Structure array name [ Subscript ]. Structure member name