各种星号输出

#include <stdio.h>
main()
{
int a,x,b,h;
scanf("%d",&h);
for (a=1;a<=h;a++)
{
for (b=h-a;b>=1;b--)
{
printf(" ");
}
for (x=1;x<=2*a-1;x++)
{
printf("*");
}
printf("\n");
}
}

#include <stdio.h>
main()
{
int a,x,h;
scanf("%d",&h);
for (a=1;a<=h;a++)
{
for (x=1;x<=2*h-2*a+1;x++)
{
printf("*");
}
printf("\n");
}
}

#include <stdio.h>
main()
{
int a,x,b,h;
scanf("%d",&h);
for (a=1;a<=h;a++)
{
for (b=h-a;b>=1;b--)
{
printf(" ");
}
for (x=1;x<=a;x++)
{
printf("*");
}
printf("\n");
}
}

#include <stdio.h>
main()
{
int a,x,b,h;
scanf("%d",&h);
for (a=1;a<=h+1;a++)
{
printf(" ");
}
printf("*\n");
for (a=1;a<=h;a++)
{
for (b=h-a+1;b>=1;b--)
{
printf(" ");
}
printf("*");
for (x=0;x<=2*a-2;x++)
{
printf(" ");
}
printf("*");
printf("\n");

}
for (a=2*h+3;a>=1;a--)
{
printf("*");
}
}