补交作业

include<stdio.h>

int main()
{
int n=1, i=1, x = 0, line, k;
char ch = 'A';
scanf_s("%d", &line);
for (ch = 'A'; ch-'A' <= line-1; ch++)
{
for (k = line - i; k >= 0; k--)
{
printf(" ");
}
printf("%c", ch);
for (x = 1; x <= 2 * i - 3; x++)
{
printf(" ");
}
if (ch != 'A')
printf("%c", ch);
printf("\n");
i++;
}
i = 1;
ch = ch - 2;
for (ch; ch - 'A' >= 0; ch--)
{
for (k=1; k <= i+1; k++)
{
printf(" ");
}
printf("%c", ch);
for (x = (ch - 'A'-1)*2; x >= 0; x=x-1)
{
printf(" ");
}
if (ch != 'A')
printf("%c", ch);
printf("\n");
i++;
}
return 0;
}