import java.util.Scanner; public class Test { public static void main(String[] args) { Scanner scan=new Scanner(System.in); System.out.println("请输入题目的数量:"); int n=scan.nextInt(); System.out.println("请输入一行的题目数量:"); int m=scan.nextInt(); String [] str2=new String [n]; for(int q=0;q<n;q++) { str2[q]=null; } for(int i=1;i<n+1;i++) { int a=(int) (1+Math.random()*(99-1+1)); int b=(int) (1+Math.random()*(99-1+1)); int x=(int) (1+Math.random()*(4-1+1)); boolean t1=true; boolean t2=true; boolean t3=true; boolean t4=true; String str1 = null; switch(x) { case 1: str1="+"; break; case 2: str1="-"; if(a<b) { t1=false; i--; } break; case 3: str1="*"; break; case 4: str1="/"; if(a%b!=0) { t2=false; i--; } break; } if(i%m==0) { t3=false; } if(t1&&t2) { if(t3) { System.out.print("第"+i+"道题 "+a+str1+b+"= "); } else { System.out.println("第"+i+"道题 "+a+str1+b+"= "); } } } } }