1、首先,單獨拿出來說++i和i++,意思都是一樣的,就是i=i+1。2、如果當(dāng)做運算符來說,就是a=i++或者a=++i這樣的形式。情況就不一樣了。先說a=i++,這個運算的意思是先把i的值賦予a,然后在執(zhí)行i=i+1;而a=++i,這個的意思是先執(zhí)行i=i+1,然后在把i的值賦予a;
2022-01-27
if(score>80){
if(sex=="女"){
System.out.println("進入女子組決賽");
}
else{
System.out.println("進入男子組決賽");
}
}
else{
System.out.println("你先回去等通知吧!");
}
if(sex=="女"){
System.out.println("進入女子組決賽");
}
else{
System.out.println("進入男子組決賽");
}
}
else{
System.out.println("你先回去等通知吧!");
}
2022-01-21
int age=25;
if(age>60){
System.out.println("老年");
} else if(age>=40){
System.out.println("中年");
} else if(age>=18){
System.out.println("青年");
} else {
System.out.println("童年");
}
if(age>60){
System.out.println("老年");
} else if(age>=40){
System.out.println("中年");
} else if(age>=18){
System.out.println("青年");
} else {
System.out.println("童年");
}
2022-01-21
if(age>18){
System.out.println("成年");
}
else{
System.out.println("未成年");
}
System.out.println("成年");
}
else{
System.out.println("未成年");
}
2022-01-21
System.out.println(a&&b);
System.out.println(a||b);
System.out.println(!c);
System.out.println(c^d);
System.out.println(a||b);
System.out.println(!c);
System.out.println(c^d);
2022-01-20
public class HelloWorld{
public static void main(String[] args) {
final String love="男";
final String love1="女";
System.out.println(love);
System.out.println(love1);
}
}
public static void main(String[] args) {
final String love="男";
final String love1="女";
System.out.println(love);
System.out.println(love1);
}
}
2022-01-18
public class HelloWorld {
public static void main(String[] args) {
int age=25;if(age>60){
System.out.println("老年");
}else if(age>40){
System.out.println("中年");
} else if(age>18){
System.out.println("少年");
}else{
System.out.println("童年");}
public static void main(String[] args) {
int age=25;if(age>60){
System.out.println("老年");
}else if(age>40){
System.out.println("中年");
} else if(age>18){
System.out.println("少年");
}else{
System.out.println("童年");}
2022-01-16
public class HelloWorld{
public static void main(String[] args) {
double avg1=78.5;
int rise=5;
double avg2=avg1+rise;
System.out.println("考試平均分:"+avg1);
System.out.println("調(diào)整后的平均分:"+avg2);
}
}
public static void main(String[] args) {
double avg1=78.5;
int rise=5;
double avg2=avg1+rise;
System.out.println("考試平均分:"+avg1);
System.out.println("調(diào)整后的平均分:"+avg2);
}
}
2022-01-12
String name="愛慕課";
char sex='男';
int num=18;
double price=120.5;
boolean isOK=true;
System.out.println(name);
System.out.println(sex);
System.out.println(num);
System.out.println(price);
System.out.println(isOK);
}
}
char sex='男';
int num=18;
double price=120.5;
boolean isOK=true;
System.out.println(name);
System.out.println(sex);
System.out.println(num);
System.out.println(price);
System.out.println(isOK);
}
}
2022-01-11
public class HelloWorld{
public static void main(String[] args) {
String Zw="我愛慕課網(wǎng)";
String Yw="idcbgp.cn";
System.out.println(Zw+'\n'+Yw);
}
}
public static void main(String[] args) {
String Zw="我愛慕課網(wǎng)";
String Yw="idcbgp.cn";
System.out.println(Zw+'\n'+Yw);
}
}
2022-01-11