第三题

//第三题

include<stdio.h>

int main()
{
int a, b, c, d, i = 0;
for (a = 0; a <= 9; a++)
{
for (b = 0; b <= 9; b++)
{
for (c = 0; c <= 9; c++)
{
for (d = 0; d <= 9; d++)
{
if ((a * 10 + b) * (c * 10 + d) == (b * 10 + a) * (d * 10 + c))
{
printf("%d%d * %d%d = %d%d * %d%d ", a, b, c, d, b, a, d, c);
i++;
if (i % 3 == 0)//每三个式子换一行
printf("\n");
}
}
}
}
}
return 0;
}