C语言:从键盘输入n(n=3,5,7,9),屏幕输出nxn矩阵,且每行每列及两对角线...答:考虑到空间效率,代码用动态二维数组解决——代码文本:include "stdio.h"include <stdlib.h> int main(int argc,char *argv[]){ char *q,**p,n,i,j,k,t;int sum;printf("Enter n(int n=3,5,7,9)...\nn=");if(scanf("%d",&n)==1 && (n==3 || n==5 || n==7 || ...