谁能帮我解决一下C啦！/“编写一个求4*4矩阵辅对角线之和的程序

什么是辅对角线?

#include <stdio.h>
#define ROW 4
#define COL 4
main()
{
int matrixA[ROW][COL];
int i,j;
int result=0;

//clrscr();
printf("Enter elements of the matrixA,");
printf("%d*%d:\n",ROW,COL);
for( i=0; i<ROW; i++ )
{
for( j=0; j<COL; j++ )
{
scanf("%d",&matrixA[i][j]);
}
}
i=0;
j=COL-1;
while(i<ROW&&j>=0)
{

result+=matrixA[i][j];
i++;
j--;
}
printf("\n The sum of the matrixA des diagonal elements is:%d\n",result);
printf("\n Press Any Key to Quit... \n");
getch();
}