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;

}