用 for 循环编写 C 语言程序打印圣诞树星形图案。
#include <stdio.h>
int main()
{
int width, height, space, i, j, k, n = 1;
printf("Please Enter Chirstmas Tree Width & Height = ");
scanf("%d %d", &width, &height);
space = width * height;
printf("Printing Chirstmas Tree Pattern of Stars\n");
for (int x = 1; x <= height; x++)
{
for (i = n; i <= width; i++)
{
for (j = space; j >= i; j--)
{
printf(" ");
}
for (k = 1; k <= i; k++)
{
printf("* ");
}
printf("\n");
}
n = n + 2;
width = width + 2;
}
for (i = 1; i <= height - 1; i++)
{
for (j = space - 3; j >= 0; j--)
{
printf(" ");
}
for (k = 1; k <= height - 1; k++)
{
printf("* ");
}
printf("\n");
}
}

此 示例 使用 while 循环打印圣诞树图案的星形。
#include <stdio.h>
void ChirstmasTreePattern(int width, int height, char ch);
int main()
{
int width, height, i, j, k, n = 1;
char ch;
printf("\nEnter Character for Chirstmas Tree Pattern = ");
scanf("%c", &ch);
printf("Please Enter Chirstmas Tree Width & Height = ");
scanf("%d %d", &width, &height);
int space = width * height;
printf("Printing Chirstmas Tree Pattern of Stars\n");
ChirstmasTreePattern(width, height, ch);
}
void ChirstmasTreePattern(int width, int height, char ch)
{
int space = width * height;
int i, j, k, n = 1;
for (int x = 1; x <= height; x++ )
{
for (i = n; i <= width; i++ )
{
for(j = space; j >= i; j--)
{
printf(" ");
}
for(k = 1; k <= i; k++)
{
printf("%c ", ch);
}
printf("\n");
}
n = n + 2;
width = width + 2;
}
for(i = 1; i <= height - 1; i++)
{
for(j = space - 3; j >= 0; j--)
{
printf(" ");
}
for(k = 1; k <= height - 1; k++)
{
printf("%c ", ch);
}
printf("\n");
}
}
Enter Character for Chirstmas Tree Pattern = *
Please Enter Chirstmas Tree Width & Height = 8 5
Printing Chirstmas Tree Pattern of Stars
*
* *
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *
* * * * * * * *
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *
* * * * * * * *
* * * * * * * * *
* * * * * * * * * *
* * * * *
* * * * * *
* * * * * * *
* * * * * * * *
* * * * * * * * *
* * * * * * * * * *
* * * * * * * * * * *
* * * * * * * * * * * *
* * * * * * *
* * * * * * * *
* * * * * * * * *
* * * * * * * * * *
* * * * * * * * * * *
* * * * * * * * * * * *
* * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * *
* * * * * * * * * *
* * * * * * * * * * *
* * * * * * * * * * * *
* * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * *
* * * *
* * * *
* * * *
* * * *