C语言

#include <stdio.h>
int main()
{ int N;
scanf("%d",&N);
int i,j,a[N][N];
for (i=0;i<N;i++)
{a[i][i]=1;
a[i][0]=1;
}
for (i=2;i<N;i++)
for (j=1;j<=i-1;j++)
a[i][j]=a[i-1][j-1]+a[i-1][j];
for (i=0;i<N;i++)
{for (j=0;j<=i;j++)
printf("%d ",a[i][j]);
printf("\n");
}
printf("\n");
return 0;
}

杨辉三角