java第一次作业
1.输出学号班级和姓名
package A;
public class XingMing {
public static void main(String[] args) {
System.out.println("计算机1902 06 富晨轩");
}
}
2.输出以下图形
*
***
*****
***
*
package A;
public class TuXing {
public static void main(String [] args) {
for(int a = 1;a<=3;a++){
for(int b = 1;b<=(3-a);b++){
System.out.print(" ");
}
for(int c = 1;c<=2*a-1;c++){
System.out.print("*");
}
System.out.print("\n");
}
for(int a =2;a>=1;a--) {
for(int b = 2;b>=a;b--){
System.out.print(" ");
}
for(int c = 1;c<=2*a-1;c++){
System.out.print("*");
}
System.out.print("\n");
}
}
}
3.定义两个整型变量a=5 b=8 求平方和并输出
package A;
public class Sum {
public static void main(String[] args) {
int a = 5;
int b = 8;
System.out.println(a*a + b*b);
System.out.println((a+b)*(a+b));
}
}