#include <stdio.h>
int main() {
int a[3][9];
int k=0;
int i=0;
for(int f=2; f<5; f++)
{
for(int n=1; n<=9; n++)
{
a[i][k]= f*n;
if(k == 9)
{
i++;
k=0;
if(i==4)
continue;
}
k++;
}
}
for(int i=0; i<3; i++)
{
printf("\n");
printf("%d단:", i+2);
for(int k=0; k<9; k++)
{
if(i == 0)
printf(" %d,", a[i][k]);
if(i == 1)
printf(" %d,", a[i][k]);
if(i == 2)
printf(" %d,", a[i][k]);
}
}
return 0;
}
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