#include<stdio.h>
main()
{   struct date{int year,month,days;}a;int i,days;printf("请输入年、月、日\n");scanf("%d,%d,%d",&a.year,&a.month,&a.days);
for(i=1;i<a.month;i++){if(i==1||i==3||i==5||i==7||i==8||i==10)days+=31;else if (i==4||i==6||i==9||i==11)days+=30;else if (i%400==0)days+=29;else days+=28; }   days+=a.days;printf("%d年%d月%d日是该年的第%d天",a.year,a.month,a.days,days);} 

#include<stdio.h>
#include<string.h>
struct person
{char name[20];int count;};struct person a[6]={"zhang",0,"li",0,"wang",0,"zhao",0,"liu",0,"zhu",0};
main(){int i,j;char abc[20];for(i=1;i<=10;i++){printf("请输入候选人名字");scanf("%s",abc);for(j=0;j<6;j++)if(strcmp(abc,a[j].name)==0)a[j].count++;}for(j=0;j<6;j++)printf("%s,%d\n",a[j].name,a[j].count);} 

# include <stdio.h>
#include<stdlib.h>
struct
{int number;char name[20];char job;union{int classes;char position[10];}category;
}person[2];
main()
{int i;for (i=0; i<2; i++){   printf("请输入姓名、学号、职位：");scanf ("%s%d %c", person[i].name, &person[i].number, &person[i].job);if(person[i].job=='s'){printf("请输入班级：");scanf("%d",&person[i].category.classes); }else if(person[i].job=='t'){printf("请输入职位：");scanf("%s",&person[i].category.position);}else{printf("input error!");abort();} }printf("\n");printf("编号    姓名    职业    班级/职务\n");for(i=0;i<2;i++) {if(person[i].job=='s')printf ("%s   %d     %c      %d\n", person[i].name, person[i].number, person[i].job, person[i].category.classes);elseprintf ("%s   %d     %c      %s\n", person[i].name, person[i].number, person[i].job, person[i].category.position);}
}

#include<stdio.h>
#define N 10
struct child
{int no;int next;
};
struct child link[30];
main()
{int i,n,m,s,count,h;printf("输入围圈人数：出圈报数，开始报数位置：");scanf("%d%d%d",&n,&m,&s);for (i=1;i<=n;i++){if(i==n)link[i].next=1;elselink[i].next=i+1;link[i].no=i;}count=0;if(s==1)h=n;else h=s-1;printf("出圈顺序为：");while(count<n-1){i=0;while(i!=m){h=link[h].next;if(link[h].no) i++;}printf("%d,",link[h].no);link[h].no=0;count++;} for(i=1;i<=n;i++)if(link[i].no!=0)printf("%d",link[i].no);
}