Manchester- C语言程序设计教程（第三版）课后习题11.1

#include <stdio.h>
#include <math.h>
 
int isleapyear(int x)
{
    if ((x % 4) == 0 && (x % 100) != 0 || (x % 400 == 0))
        return 1;
    else  return 0;
}

    int main()
    {
        struct time
        {
            int year;
            int month;
            int day;
        };
        struct time rain;
        scanf("%d", &rain.year);
        scanf("%d", &rain.month);
        scanf("%d", &rain.day);
        int days=0, leap;
        leap = isleapyear(rain.year);
        switch (rain.month)
        {
        case 12:days += 30;
        case 11:days += 31;
        case 10:days += 30;

typedef struct DATA{
	int year;
	int mon_get;
	int month[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	int day;
}Data;

int main(){
	Data data;
	int count_day = 0;   //表示天数 
	int pos = 0;  //标记是否为一月 
	
	scanf("%d %d %d", &data.year, &data.mon_get, &data.day);
	if ((data.year%4 == 0 && data.year%100 != 0) || data.year%400 == 0)  //如果是世纪闰年 
		data.month[1] = 29;
	for (int i=1; i<data.mon_get; ++i){
		count_day += data.month[i-1];
		pos++;
	}
	count_day += data.day;
	if (pos == 0)
		count_day = data.day; 
	printf("%d\n", count_day);
	
	return 0;
} 
这样为什么编译错误

/*先令sum等于键盘输入的天数，再加上输入月数的前面的月份的天数*/
#include<stdio.h>
struct date
{
    int year;
    int month;
    int day;
}p;

int main()
{
	scanf("%d%d%d",&p.year,&p.month,&p.day);

	int a[12]={31,28,31,30,31,30,31,31,30,31,30,31};

	int sum=p.day;//sum等于输入的天数

    for(int i=0;i<p.month-1;i++)//下标0开始
    {
        sum+=a[i];
    }
    //这里的if语句只有月份大于2，闰年的判断才有意义
    if((p.year%4==0&&p.year%100!=0)||(p.year%400==0)&&p.month>2)
    {
        printf("%d",sum+1);
    }
    else
    {
        printf("%d",sum);
    }
	return 0;
}

#include<stdio.h>
int chuli(int n[12]){
    int year,month,day,sum=0;
    scanf("%d%d%d",&year,&month,&day);
   // n[12]={31,28,31,30,31,30,31,30,31,30,31,30};
    if((year%4==0&&year%100!=0)||(year%400==0))
        n[1]=29;
    for(int i=0;i<month-1;i++){
        sum=sum+n[i];
    }
    sum=sum+day;
    return sum;
}
int main()
{
    int n[12]={31,28,31,30,31,30,31,30,31,30,31,30};
    printf("%d",chuli(n));
    
   // while(~scanf("%d%d", &a, &b))printf("%d\n",a+b);
    return 0;
}//有没有大佬指点一下，提交说我答案错误。。

#include<stdio.h>
int main()
{
    int a,b,c;
    scanf("%d%d%d",&a,&b,&c);
    int sum=0;
    int d[12]={31,28,31,30,31,30,31,31,30,31,30,31};
    if((a%4==0&&a%100!=0)||a%400==0)
        d[1]=29;
    for(int i=0;i<b-1;i++){
            sum+=d[i];
          }
    sum+=c;
    printf("%d",sum);
	return 0;
}
我感觉这样简单一点

#include<stdio.h>
typedef struct time
{
	int mouth,year,day;
}time_s;
int main()
{
	int T;
	T=0;
	time_s time;
	int a[12]={31,29,31,30,31,30,31,31,30,31,30,31};
	scanf("%d%d%d",&time.year,&time.mouth,&time.day);
	if((time.year%100==0&&time.year%4==0))
	{
		if(time.mouth==1)
		{
		   T=T+time.day;	
		}else{
		T=T+time.day;
		for(int i=0;i<time.mouth-1;i++)
		{
			T=T+a[i];
		}
	}
	}else{
		a[1]=28;
		if(time.mouth==1)
		{
		    T=T+time.day;	
		}else{
			T=T+time.day;
			for(int i=0;i<time.mouth-1;i++)
		{
			T=T+a[i];
		}
	}
}
	printf("%d",T);
	return 0;
}

大佬们可以看看错误50%，错哪了？

#include<stdio.h>
struct number
{
	int year;
	int month;
	int day;
};
int main()
{
	struct number num;
	scanf("%d%d%d",&num.year,&num.month,&num.day);
	int isprim,days=0;
if((num.year%4) && !(num.year%100) || !(num.year%400)){
		isprim=1;
	}else{
		isprim=0;
	}	
	int i;
	for(i=3;i<num.month;i++){//判断闰年 
		if(i%2 != 0){
			days+=31;
		}else{
			days+=30;
		}
	}
	days=days+num.day;
	if(isprim==1){
		days=days+31+29;
	}else{
		days=days+31+28;
	}
	printf("%d\n",days);	
	return 0;
}

#include<stdio.h>
struct date
{
    int year;
    int month;
    int day;
};
int main()
{
    struct date * p,i;
    int j,k=0;
    p=&i;
    scanf("%d%d%d",&p->year,&p->month,&p->day);
    int a[12]={31,28,31,30,31,30,31,31,30,31,30,31};
    for(j=0;j<p->month-1;j++)
    {
        k+=a[j];
    }
    if(p->year % 4 == 0 && p->year % 100 == !0 || p->year % 400== 0)
    {
        printf("%d",k+p->day+1);
    }
    else
    printf("%d",k+p->day);
    return 0;
}