题解 | #计算日期到天数转换#
计算日期到天数转换
https://www.nowcoder.com/practice/769d45d455fe40b385ba32f97e7bcded
#include <iostream> using namespace std; #define isyear(x) ((x%4 == 0)&&(x%100 !=0)||(x%400 == 0)) bool Check(int year,int month,int day) { static int MonthDay[13][2]={0,0,31,31,28,29,31,31,30,30,31,31,30,30,31,31,31,31,30,30,31,31,30,30,31,31}; if(year<1000||year>9999) return false; if(month<1||month>12) return false; if(day<1||day>MonthDay[month][isyear(year)]) return false; return true; } int GetDay(int year,int month,int day) { static int Day[13][2]={0,0 ,31,31, 59,60, 90,91, 120,121, 151,152, 181,182, 212,213, 243,244, 273,274, 304,305, 334,335, 365,366}; if(!Check(year,month,day)) return -1; int daysum=Day[month-1][isyear(year)]+day; return daysum; } int main() { int y,m,d; cin>>y>>m>>d; int day=GetDay(y,m,d); if(day == -1) { cout<<"日期非法"<<endl; } else { cout<<day<<endl; } return 0; }