新手上路!!求助!!

[liumeng_1994]

#include<stdio.h>
int main()
{
printf("please input the month number: ");
int a;
scanf("%d",&a);
if(a>=12 && a<0)
printf("\nInvalid month input !\n");
if(a == 1,3,5,7,8,10,12); //判断月份...31天的月份//
printf("\n 2003.%d has 31 days\n",a);
if(a == 4,6,9,11);
printf("\n 2003.%d has 30 days\n",a); //判断月份...30天的月份//
if(a=2)
printf("\n 2003.%d has 28 days\n",a);
return 0;
}

[PIE]

引用 2 楼 anhuizhuanjiao 的回复:

引用 楼主 liumeng_1994 的回复:#include<stdio.h> int main() { printf("please input the month number: "); int a; scanf("%d",&amp;a); ……

++顶一个

[didijiji]

贴代码套用一下格式嘛。

[dhdahai]

好牛叉的代码

[转角天边]

引用 楼主 liumeng_1994 的回复:

#include<stdio.h> int main() { printf("please input the month number: "); int a; scanf("%d",&a); if(a>=12 && a<0)……

代码给你改过来了，楼主多看看书

int main()
{
	printf("please input the month number: ");
	int a;
	scanf("%d",&a);                                                    
	if(a>=12 && a<0)
		printf("\nInvalid month input !\n");
	if(a == 1||a==3||a==5||a==7||a==8||a==10||a==12)       //判断月份...31天的月份//
		printf("\n 2003.%d has 31 days\n",a);
	if(a == 4||a==6||a==9||a==11)
		printf("\n 2003.%d has 30 days\n",a);      //判断月份...30天的月份//
	if(a==2)
		printf("\n 2003.%d has 28 days\n",a);
	system("pause");
	return 0;
}

[dhdahai]

还有一句： if(a>=12 && a<0) =====> if(a>=12 || a<0)