int main()
{
int i, j;
int a[10][10];
printf("\n");
for (i = 0; i < 10; i++) {
a[i][0] = 1;
a[i][i] = 1;
}
for (i = 2; i < 10; i++)
for (j = 1; j < i; j++)
a[i][j] = a[i - 1][j - 1] + a[i - 1][j];
for (i = 0; i < 10; i++) {
for (j = 0; j <= i; j++)
printf("%5d", a[i][j]);
printf("\n");
}
}