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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
int main()
{
int n=9;
printf("请输入一个正整数n");
scanf("%d", &n);
if (n < 1 || n > 9)
{
printf("输入错误,请重新输入!\n");
}
else
{
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= i; j++)
{
printf("%d*%d=%d ", i, j, i * j);
if (i == j)
{
printf("\n");
}
}
}
}
return 0;
}