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: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 || n==9)){ q=(char *)malloc(sizeof(char)*n*n);if(q && (p=(char **)malloc(sizeof(char *)*n))){ for(p[0]=q,...