答案:
代码:
public class bob { public static void main(String[] args) { int i=1,j=5,k; int d=(int)(Math.random()*10)+1; System.out.print("while条件下的使用:"); while(i>0){ System.out.print(i+" "); i++; if(i==11) break; } System.out.println(); System.out.print("do while条件下的使用:"); do{ System.out.print(j+" "); j--; if(j==0) break; }while(j<5); System.out.println(); System.out.print("for条件下的使用:"); for(k=1;k<=100;k++){ System.out.print(k+" "); if(k==10){ break; } } System.out.println(); System.out.print("switch条件下的使用:"); switch(d){ case 1: System.out.println("beautiful"); break; case 2: case 3: case 4: case 5: case 6: System.out.println("ugly"); break; case 7: System.out.println("I love you!"); break; default: System.out.println("so so..."); } } }