输入四个人的年龄和姓名，排序后，按年龄，从小到大输出人员年龄及其姓名

#include<stdio.h>
struct student{
    int age;
    char name[4];
};
int main(void)
{
    int i,index,j;
    struct student students[4],temp;

    for(i=0;i<4;i++)
    {
        scanf("%d",&students[i].age);
        scanf("%s",students[i].name);
    }
        for(i=0;i<4-1;i++)
        {
            index=i;
            for(j=i+1;j<4;j++)
                if(students[j].age<students[index].age)
                    index=j;
                temp=students[index];
                students[index]=students[i];
                students[i]=temp;
        }
        for(i=0;i<4;i++)
            printf("%d %s\n",students[i].age,students[i].name);
        
       return 0;
}