#include<stdio.h>
void main()
{ int i,j;
for ( i=1;i<=9;i++ ) //直角邊在左下 { for ( j=1;j<=i;j++ ) printf("%d×%d=%-d\t",i,j,i*j);printf("\n");
} printf("\n"); for ( i=1;i<=9;i++ ) //直角邊在右下 { for ( j=1;j<10-i;j++ ) printf("\t");for ( j=1;j<=i;j++ ) printf("%d×%d=%-d\t",i,j,i*j);
printf("\n");
} printf("\n"); for ( i=1;i<=9;i++ ) //直角邊在右上 { for ( j=1;j<i;j++ ) printf("\t");for ( j=1;j<=10-i;j++ ) printf("%d×%d=%-d\t",i,j,i*j);
printf("\n");
} printf("\n"); for ( i=1;i<=9;i++ ) //直角邊在左上 { for ( j=1;j<=10-i;j++ ) printf("%d×%d=%-d\t",i,j,i*j);printf("\n");
}}