输出一个空心六边形，边长用*显示。

#include
int a[5][7]={{0,0,1,1,1,0,0},{0,1,0,0,0,1,0},{1,0,0,0,0,0,1},{0,1,0,0,0,1,0},{0,0,1,1,1,0,0}};int main(){int i,j;for(i=0;i<5;i++){ for(j=0;j<7;j++) { if(a[i][j]==1) printf("*"); else printf(" "); } printf("\n");}}

如果不用数组呢？