C语言

#include<stdio.h>
int main()
{
	int i=1,j;
	int n;
	printf("请输入一个1到9的正整数:\n");
	scanf("%d",&n);
	while(i<=n){
		j=1;
		while(j<=i){
			printf("%d*%d=%d",j,i,i*j);
			if(i*j<10){
				printf("   ");
			}else{
			printf("  ");
			}
			j++;
		}
		printf("\n");
		i++;
	}
	return 0;
}