任意边长正方形

/*    1 function     2 while    */  #include "stdio.h"     void printMatrix(int bianchang){     int n ;       int i;     int j;     /* bianchang -> n*/     n=bianchang;     /*step 1 printf *****  */     i=0;     while(i<n){       printf("* ");       i=i+1;      }     printf("\n");     /*step 2 printf *    *  */     for(i=0;i<n-1;i++)     {          printf("* ");          for( j=0; j<n-2; j++)              printf("  ");          printf("*\n");      }     /*step 3 printf *****  */     i=0;     while(i<n){       printf("* ");       i=i+1;      }  }    void main()  {     int b;     printf("input bianchang please: ");          scanf("%d",&b);                while(b>0){        printMatrix(b);        printf("\ninput bianchang please: ");        scanf("%d",&b);     }  }