``` #include <bits/stdc++.h> using namespace std; int main() { int day[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; bool flag; long long res=0; for(int year=1921;year<=2020;year++) { if((year % 4 == 0) && (year % 100!=0) || (year%400==0)){ day[2]=29; }else{ day[2]=28; } for(int month=1;month<=12;month++) { for(int i=1;i<=day[month];i++) { if(year==1921 && month ==7 &&i==23){ flag =true; } if(flag) res++; if(year==2020 && month==7 && i==1){ //cout<<res-1<<endl; cout<<(res-1)\*24\*60<<endl; } } } } return 0; } ```

```cpp #include <cstdio> #include <iostream> #include <algorithm> #include <utility> #include <queue> #include <map> #include <set> #include <vector> #include <tuple> #include <functional> #include <unordered_set> #include <unordered_map> #include <list> #include <cmath> using namespace std; using ll = long long; int main() { bool tag = 0; int dd = 0; for (int y = 1921; y <= 2020; ++y) { for (int m = 1; m <= 12; ++m) { for (int d = 1; d <= 31; ++d) { if (m == 2) { if (y % 400 == 0 || (y % 100 != 0 && y % 4 == 0)) { if (d > 29) break; } else { if (d > 28) break; } } if (m == 4 || m == 6 || m == 9 || m == 11) if (d > 30) break; if (y == 1921 && m == 7 && d == 23) { tag = 1; } if (y == 2020 && m == 7 && d == 1) goto A; if (!tag) continue; ++dd; } } } A: cout << dd * 60 * 24; return 0; } ```

``` #include<bits/stdc++.h> using namespace std; int m1[] = {0,1,3,5,7,8,10,12};//数组m1存储大月 int m2[] = {0,4,6,9,11};//数组m2存储小月 int main(){ int year = 1921,month = 7,day = 23; int year2 = 2020,month2 = 7,day2 = 1; int ans = 0; while(1){ ans++; day++; for(int j = 1;j <=7;j++){ if(month==m1[j] && day == 32){//大月满32天进一月 month++; day=1; break; } } for(int j = 1;j <= 4;j++){ if(month == m2[j] && day == 31){//小月满31天进一月 month++; day=1; break; } } if(month == 2){ if((year%4==0 && year%100 !=0) || (year%400==0)){ if(day==30){ month++; day=1; } }else{ if(day==29){ month++; day=1; } } } if(month==13){//满13月进1年 month = 1; year++; } if(year == year2 && month == month2 && day == day2){ break; } } long long minuter = ans*24*60; cout<<minuter<<endl; return 0; } ```

``` #include <iostream> using namespace std; bool isLeap(int year) { return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); } int days(int month, int year) { switch (month) { case 2: return isLeap(year) ? 29 : 28; case 4: case 6: case 9: case 11: return 30; default: return 31; } } int daysDates(int startDay, int startMonth, int startYear, int endDay, int endMonth, int endYear) { int totalDays = 0; for (int y = startYear+1; y < endYear; ++y) totalDays += isLeap(y) ? 366 : 365; for (int m = startMonth; m <= 12; ++m) totalDays += days(m, startYear); totalDays -= startDay; for (int m = 1; m < endMonth; ++m) totalDays += days(m, endYear); totalDays += endDay; return totalDays; } int main() { int startDay = 23, startMonth = 7, startYear = 1921; int endDay = 1, endMonth = 7, endYear = 2020; int totalDays = daysDates(startDay, startMonth, startYear, endDay, endMonth, endYear); int totalMinutes = (totalDays) * 24 * 60; cout << totalMinutes << endl; return 0; } ```

``` #include <iostream> using namespace std; int m[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; int time; int main() { int a = 1921, b = 7, c = 23; int year = 2020, morth = 7, day = 1; for (int i = 1; ; i ++ ) { c ++ ; if ((a % 4 == 0 && a % 100 != 0) || (a % 400 == 0)) { m[2] = 29; if (c == m[b] + 1) { b ++ ; c = 1; } } else { m[2] = 28; if (c == m[b] + 1) { b ++ ; c = 1; } } if (b == 13) { a ++ ; b = 1; } if (a == year && b == morth && c == day) { cout << i * 24 * 60; break; } } return 0; } ```

using namespace std; int main() { int num=0; ``` int flag=0; for(int year=1921;year<=2020;year++) ``` for(int month=1;month<=12;month++) for(int day=1;day<=31;day++) { ``` if(month==1||month==3||month==5||month==7||month==8||month==10||month==12); ``` else if (month==2) { ``` if((year%4==0&&year%100!=0)||year%400==0) { if(day>=29)break; } else { if(day>=28)break; } } else{ if(day>=30)break; } if(year==1921&&month==7&&day==23) { flag=1; } if(flag==1)num+=60\*24; if(year==2022&&month==7&&day==1) { cout<<num-24\*60<<endl; return 0; ``` } } }

``` #include <bits.stdc++.h> using namespace std; //20.1B2 纪念日 //偷了点懒没写else void days(int &yyyy, int &mm, int &dd, int &count) { if(mm==1 || mm==3 || mm==5 || mm==7 || mm==8 || mm==10 || mm==12) { if(mm==12 && dd==31) { yyyy++; dd=1; mm=1; count++; } if(dd>0 && dd<31) { dd++; count++; } else if(dd==31) { dd=1; mm++; count++; } } else if(mm==4 || mm==6 || mm==9 || mm==11) { if(dd>0 && dd<30) { dd++; count++; } else if(dd==30) { dd=1; mm++; count++; } } else if(mm==2) { if((yyyy%4==0 && yyyy%100!=0) || yyyy%400==0) { if(dd>0 && dd<29) { dd++; count++; } else if(dd==29) { dd=1; mm++; count++; } } else if(yyyy>1900 && yyyy<2050) { if(dd>0 && dd<28) { dd++; count++; } else if(dd==28) { dd=1; mm++; count++; } } } } int main() { int yyyy=1921; int mm=7; int dd=23; int count=0; while(yyyy!=2020 || mm!=7 || dd!=1) { days(yyyy, mm, dd, count); } int minutes=24*60*count; cout << minutes << endl; return 0; } ```

EXCEl：通过excel表中的DATE（2020，7，1）-DATE（1921，7，23）=36138，剩下的还需要我计算吗？

``` #include<bits/stdc++.h> using namespace std; int dayOfMonth[2][13] = { {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} }; // 是否是闰年 bool isLeapYear(int year) { return year % 400 == 0 || (year % 4 == 0 && year % 100 != 0); } // 给当前日期加1天（注意参数都用了引用&，这样对参数的修改可以同步到函数外） void addOneDay(int &year, int &month, int &day) { day++; // 让day加1 if (day > dayOfMonth[isLeapYear(year)][month]) { // 如果超过当前月的天数 month++; // 让month加1 day = 1; // 重置day为1号 } if (month > 12) { // 如果月份大于12 year++; // 让year加1 month = 1; // 重置month为1月 } } int main() { // ios::sync_with_stdio(0); // cin.tie(0); // cout.tie(0); int year=1921,month=7,day=23; long long res=0; while(year!=2020||month!=7||day!=1)//跑到2020.10.1要包含这天就得往后延一天 { addOneDay(year,month,day); res++; } cout<<res*60*24; return 0; } ```

``` #include <iostream> #include <algorithm> using namespace std; int main() { int cnt=0,flag=0; for(int year=1921;year<=2020;year++) for(int month=1;month<=12;month++) for(int day=1;day<=31;day++) { if(month==1 ||month==3||month==5||month==7||month==8||month==10||month==12); else if(month==2) { if((year%4==0&&year%100!=0)||year%400==0) { if(day>29)break; } else { if(day>28)break; } } else { if(day>30)break; } //更改代码从这里开始 if(year==1921 && month ==7 && day ==23)//第一个日期 ，开始计时 { flag=1; } if(flag==1) cnt+=60*24; if(year==2020 && month ==7 && day ==1)//第二个日期 { cout<<cnt-24*60<<endl; //程序计算的是从1921年7月23到2020年7月1日，两个日期分别多算了12h return 0;//直接跳出循环关闭 } } } ```