十七：求日期

 1 #include<stdio.h>
 2 int b[3]={2015,11,14};
 3 void fun(int n){
 4     int a[12]={30,31,31,28,31,30,31,30,31,31,30,31};
 5     int c[12]={11,12,1,2,3,4,5,6,7,8,9,10};
 6     n=n+b[2];
 7     while(1){
 8         for(int i=0;i<12;i++){
 9             if(i==3){
10                 b[0]++;
11                 if(b[0]%4==0&&b[0]%100!=0||b[0]%400==0){
12                     a[3]=29;
13                 }else{
14                     a[3]=28;
15                 }
16             }
17             if(n>a[i]){
18                 n-=a[i];
19             }else{
20                 b[1]=c[i];
21                 b[2]=n;
22                 return;
23             }
24         }
25     }
26 }
27 int main(){
28     int n;
29     scanf("%d",&n);
30     fun(n);
31     printf("%d-%d-%d",b[0],b[1],b[2]);
32     return 0;
33 }