编程：输出一个菱形

#include <stdio.h>
void printchar (int m,char ch)
{
int i;
for (i=0;i<m;i++)
{
putchar(ch);
}
}
int main()
{
int i,j;
for (i=0;i<5;i++)
{
printchar (5-i,' ');
printchar (2*i+1,'*');

printf ("\n");
}
for (i=3;i>=0;i--)
{
printchar (5-i,' ');
printchar (2*i+1,'*');

printf ("\n");

}

getchar ();
return 0;

}