学习c语言第四题

题目四

输入某年某月某日，判断值一天是这一年的第几天。

我尝试了一下用if语句进行编程。语句可能有些麻烦

#include 
#include 

int main()
{
    int y,m,d;
    printf("Please input year,month and day.n");
    scanf("%d %d %d",&y,&m,&d);
    if((y%4==0&&y%100!=0)||y%400==0)
    {
        if(m==1)
        {
            printf("number is %dn",d);

        }
        else if(m==2)
        {
            printf("number is %dn",d+31);
        }
        else if(m==3)
        {
            printf("number is %dn",d+31+29);
        }
        else if(m==4)
        {
            printf("number is %dn",d+31+29+31);
        }
        else if(m==5)
        {
            printf("number is %dn",d+31+29+31+30);
        }
        else if(m==6)
        {
            printf("number is %dn",d+31+29+31+30+31);
        }
        else if(m==7)
        {
            printf("number is %dn",d+31+29+31+30+31+30);
        }
        else if(m==8)
        {
            printf("number is %dn",d+31+29+31+30+31+30+31);
        }
        else if(m==9)
        {
            printf("number is %dn",d+31+29+31+30+31+30+31+31);
        }
        else if(m==10)
        {
            printf("number is %dn",d+31+29+31+30+31+30+31+31+30);
        }
        else if(m==11)
        {
            printf("number is %dn",d+31+29+31+30+31+30+31+31+30+31);
        }
        else if(m==12)
        {
            printf("number is %dn",d+31+29+31+30+31+30+31+31+30+31+30);
        }

    }
    else
    {
                if(m==1)
        {
            printf("number is %dn",d);

        }
        else if(m==2)
        {
            printf("number is %dn",d+31);
        }
        else if(m==3)
        {
            printf("number is %dn",d+31+28);
        }
        else if(m==4)
        {
            printf("number is %dn",d+31+28+31);
        }
        else if(m==5)
        {
            printf("number is %dn",d+31+28+31+30);
        }
        else if(m==6)
        {
            printf("number is %dn",d+31+28+31+30+31);
        }
        else if(m==7)
        {
            printf("number is %dn",d+31+28+31+30+31+30);
        }
        else if(m==8)
        {
            printf("number is %dn",d+31+28+31+30+31+30+31);
        }
        else if(m==9)
        {
            printf("number is %dn",d+31+28+31+30+31+30+31+31);
        }
        else if(m==10)
        {
            printf("number is %dn",d+31+28+31+30+31+30+31+31+30);
        }
        else if(m==11)
        {
            printf("number is %dn",d+31+28+31+30+31+30+31+31+30+31);
        }
        else if(m==12)
        {
            printf("number is %dn",d+31+28+31+30+31+30+31+31+30+31+30);
        }

    }

}

这里我又尝试了化简了一下代码。

下篇文章再化简叭，懒得敲了。。。。。。