Java 编写9*9乘法表

刺骨的言语ヽ痛彻心扉 2022-02-19 19:36 156阅读 0赞

输出9\*9乘法表：

public class Multiplication{
    	public static void main(String[] args){
    		//倒三角
    		for (int i = 1; i <=9; i++) {
    			for (int j = 1; j <=i; j++) {
    				System.out.print(j+"*"+i+"="+(i*j)+"\t");
    			}
    			System.out.println();
    		}	
      }
    }

![20190416231704914.png][]

另一种方式输出：

public class Multiplication{ 
     public static void main(String args[]) 
        { 
         int i,j,n=9; 
         System.out.print("    *    |"); 
         for (i=1;i<=n;i++) 
             System.out.print("    "+i); 
             System.out.print("\n-------|"); 
        for (i=1;i<=n;i++) 
             System.out.print("----"); 
             System.out.println(); 
        for (i=1;i<=n;i++){ 
          System.out.print("     "+i+"    |"); 
          for (j=1;j<=i;j++) 
            System.out.print(" "+i*j); 
          System.out.println(); 
        } 
      } 
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDU3NDQz_size_16_color_FFFFFF_t_70][]

递归实现：

public class Multiplication {
      public static void main(String[] args) {
        m(9);
      }
      /*
      * 递归99乘法表
      * 
      * */
      public static void m(int i){
        if(i==1){
          System.out.println("1*1=1");
        }else{
          m(i-1);
        for(int j=1;j<=i;j++){
          System.out.println(j + "*" + i + "=" + j * i+" ");
        }
          System.out.println(" ");
        }
        }
    }

[20190416231704914.png]: /images/20220219/9da1a535c694482cbcdced0c94134690.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDU3NDQz_size_16_color_FFFFFF_t_70]: /images/20220219/6305b29689f5440e8fdf60f364b77d0e.png