1.输入年份判断是闰年还是平年?
System.out.println("请输入年份:");
Scanner sc=new Scanner(System.in);
String ss=sc.nextLine();
int year=Integer.parseInt(ss);
if(year%400==0 || (year%4==0 && year%100!=0)){
System.out.println(year+"年是闰年");
}else{
System.out.println(year+"年是平年");
}
2.输入身高体重性别判断身体比例是否正常?
Scanner sex=new Scanner(System.in);
System.out.println(" 请输入性别:");
String se=sex.nextLine(); if(se.equals("男")){ System.out.println(" 请输入身高:");
String he=sex.nextLine();
int sg=Integer.parseInt(he); System.out.println(" 请输入体重:");
String we=sex.nextLine();
int tz=Integer.parseInt(we); int bz = sg-100;
if(bz-tz>=-3 && bz-tz<=3){
System.out.println("正常");
}else{
System.out.println("不正常");
} }else if(se.equals("女")){ System.out.println(" 请输入身高:");
String he=sex.nextLine();
int sg=Integer.parseInt(he); System.out.println(" 请输入体重:");
String we=sex.nextLine();
int tz=Integer.parseInt(we); int bz = sg-110;
if(bz-tz>=-2 && bz-tz<=2){
System.out.println("正常");
}else{
System.out.println("不正常");
} }else{
System.out.println("你走开!");
}
3.输入三个数,输出最大值
System.out.println("其输入三个数:");
Scanner v=new Scanner(System.in);
String a=v.nextLine();
int a1=Integer.parseInt(a); String b=v.nextLine();
int b1=Integer.parseInt(b); String c=v.nextLine();
int c1=Integer.parseInt(c); int big;
if(a1>b1){
big=a1;
if(a1>c1){
big=a1;
System.out.println(big);
}else{
big=c1;
System.out.println(big);
}
}else{
big=b1;
if(b1>c1){
big=b1;
System.out.println(big);
}else{
big=c1;
System.out.println(big);
}
}
4.登录验证
Scanner scan=new Scanner(System.in);
System.out.println("请输入用户名:");
String yhm=scan.nextLine(); System.out.println("请输入密码:");
String mm=scan.nextLine(); if(yhm.equals("admin")){ if(mm.equals("admin")){ System.out.println("恭喜您登陆成功"); }else{ System.out.println("对不起您输入的密码不正确"); } }else{ System.out.println("对不起您输入的用户名不正确");
if(mm.equals("admin")){ }else{ System.out.println("对不起您输入的密码不正确"); }
}