问题是这样的：使用嵌套循环输出一个用星号绘制的矩形，它的宽和高由用户输入，例如******
                                                                              *    *
                                                                              *    *
                                                                              *    *
                                                                              *    *
                                                                              ******
然后我自己写了一部分就不知道怎么写了，哪位帮我看看怎么写下去呢，谢了。
                                     程序#include<stdio.h>
                                          int main(void)
                                         {
                                           int n,h,i;
                                           printf("please input n:   h:   ");
                                           scanf("%d,%d",&n,&h);
                                           for(i=0;i<=h;++i)
                                           printf("\n*  *");
                                           while(n--)putchar('*');

                                           }
刚开始接触c语言，还望大家见谅！

谢了。。做出来了，虽然方法很笨。。