C语言关于二维数组(N*N)行列互换程序

#define N 5
void main()
{
int a[N][N] = {0};/* 初值自己写吧 */
int i, j, iTemp;

for ( i = 1; i < N; ++i )
{
for ( j = 0, j < i; ++j )
{
iTemp = a[i][j];
a[i][j] = a[j][i];
a[j][i] = iTemp;
}
}

return;
}