给定矩阵的C程序以交换对角线元素

#include
main (){
int i,j,m,n,a;
static int ma[10][10];
printf ("Enter the order of the matrix m and n

");
scanf ("%dx%d",&m,&n);
if (m==n){
printf ("Enter the co-efficients of the matrix

");
for (i=0;i