复制代码 代码如下:

#include <stdio.h>

#include <stdlib.h>

int main()

{

int i,j,k;

int line;

int *prev, *next;

printf("输入要查看杨辉三角的行数（大于2）:");

scanf("%d",&line);

if(line < 2)

{

printf("行数小于2，Goodbye!n");

exit(1);

}

for(i=1; i<=line; i++)//前两行的打印

printf(" ");

printf("%6dn",1);

for(i=1; i<=line-1; i++)

printf(" ");

printf("%6d%6dn",1,1);

prev = malloc(2*sizeof(int));

prev[0] = 1;

prev[1] = 1;

for(i=3; i<=line; i++)//从第三行开始打印

{

next = malloc(i*sizeof(int));

next[0] = 1;

next[i-1] = 1;

for(j=line; j>=i; j--)//外部空格

{

printf(" ");

}

printf("%6d",1);

for(k=2; k<i; k++)//数字

{

next[k-1] = prev[k-2] + prev[k-1];

printf("%6d",next[k-1]);

}

}

printf("%6dn",1);

free(prev);

prev = next;

}

free(next);

return 0;

}