c语言输出杨辉三角

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");

}

}