c++编程，给出年月日，计算该日是该年的第几天？

Question

c++编程，给出年月日，计算该日是该年的第几天

Answer 1

 

1	#include <iostream>

 

1	using namespace std;

 

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int main() {     int sum_day(int month,int day);     int is_leap(int year);     int year,month,day,days;

 

1 2	cout<<"Enter date(for example:2015 1 14):\n";     cin>>year>>month>>day;

 

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days=sum_day(month,day);     if(is_leap(year)&&month>2)         days+=1;

 

1	cout <<year<<"/"<<month<<"/"<<day<<"is the "<<days<<" day in this year!\n";

 

1 2	return 0; }

 

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int sum_day(int month,int day) {     int day_tab[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};     int i;     for(i=1;i<month;i++)         day+=day_tab[i];     return day; }

 

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int is_leap(int year) {    return ((year%4==0&&year%100!=0) ||year%400==0); } 我在code blocks上运行没有问题

Answer 2

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#include<iostream> using namespace std; int d[2][12]={{31,28,31,30,31,30,31,31,30,31,30,31},               {31,29,31,30,31,30,31,31,30,31,30,31} }; int days(int m,int a=0) {      int sumday=0;  for(int i=0;i<m-1;++i)   sumday+=d[a][i];  return sumday; } int main() {  int day=0,month=0,year=0;  cout<<"day   :";cin>>day;  cout<<"month :";cin>>month;  cout<<"year  :";cin>>year;     int a=0;  //  闰年判断  if((year%4==0&&year%100!=0)||year%400==0)a=1;  switch(month)  {  case 1:case 2:  case 3:case 4:  case 5:case 6:  case 7:case 8:  case 9:case 10:  case 11:case 12: cout<<days(month,a)+day<<endl;  default: break;  }     return 0; }

Answer 3

# include <stdio.h>

# include <conio.h>

int sum_day(int month, int day);

int leap(int year);

void main()

{

int year, month, day;

int days;

printf("请输入日期(年，月，日)：");

scanf("%d, %d, %d", &year, &month, &day);

printf("%d年%d月%d日", year, month, day);

days = sum_day(month, day);

if(leap(year) && month>=3)

days = days + 1;

printf("是该年的第%d天.\n", days);

getch();

}

static int day_tab[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int sum_day(int month, int day)

{

int i;

for(i=1; i<month; i++)

day = day + day_tab[i];

return day;

}

int leap(int year)

{

int leap;

leap = (year%4==0&&year%100!=0)||(year%400==0);

return leap;

}

没调试过，机子上暂时没工具，应该是没问题了。你试试