#include<stdio.h>
int main(){
int year,month
int a=0
printf("输入任意符合范围（1月~12月）的月份和（1900年~9999年）年份，且两个值之间空格分隔。\n")
scanf("%d %d",&year,&month)
if(year%4==0&&year%100!=0||year%400==0)
a=1//结果为1代表闰年
switch(month){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
printf("year =%d month =%d days=31\n",year,month)
break
case 2:
if(a==1)
printf("year =%d month =%d days=29\n",year,month)
else
printf("year =%d month =%d days=28\n",year,month)
break
case 4:
case 6:
case 9:
case 11:
printf("year =%d month =%d days=30\n",year,month)
break
}
return 0
}
String tempStr = "ssssgoodssss"int result = tempStr.indexOf("good")返回good在tempStr中的序号
如果result=-1说明不含有指定的字符串
