#include<stdio.h>
void main(void){
int year = 2018;
int month = 8;
int day = 8;
int sum = 0;
switch(month){
case 1: sum = 0; break;//case 1: sum = 0, break;
case 2: sum = 31; break;
case 3: sum = 59; break;
case 4: sum = 90; break;
case 5: sum = 12; break;
case 6: sum = 151; break;
case 7: sum = 181; break;
case 8: sum = 212; break;
case 9: sum = 243; break;
case 10: sum = 273; break;
case 11: sum = 304; break;
case 12: sum = 334; break;
default: printf("输入有误");
}
sum += day;
if(year % 400 ==0 || (year % 4 ==0 && year % 100 != 0)){ //是闰年
if(month > 2){
sum++;
}
}
printf("%d年%d月%d日是该年的第%d天\n", year, month, day, sum);
}
#include<stdio.h>
void main(void){
int year = 2018;
int month = 8;
int day = 8;
int days = 0;
switch(month){
case 12:days+=30;
case 11:days+=31;
case 10:days+=30;
case 9:days+=31;
case 8:days+=31;
case 7:days+=30;
case 6:days+=31;
case 5:days+=30;
case 4:days+=31;
case 3:{
if(year%400==0 || (year%4==0 && year%100!=0) ){
days+=29;
}else{
days+=28;
}
}
case 2:days+=31;
case 1:days+=day;
}
printf("%d年%d月%d日是该年的第%d天\n", year, month, day, days);
}
别人家的代码:感觉思路很好,记录在此