#include <stdio.h>
#define R 3
#define C 4
int main(int argc, const char * argv[])
{

int a[R][C]={
    {1,2,3,4},
    {5,6,7,8},
    {9,10,11,12},
};
int b[C][R];
int i,j;
printf("a为：\n");
for (i=0;i<R;i++)
{
    for(j=0;j<C;j++)
    {
        printf("%-3d",a[i][j]);
    }
    printf("\n");
}
printf("aT为：\n\n");
for (i=0;i<C;i++)
{
    for(j=0;j<R;j++)
    {
        b[i][j]=a[j][i];
    }
}

for (i=0;i<C;i++)
{
    for(j=0;j<R;j++)
    {
        printf("%-3d",b[i][j]);
    }
    printf("\n");
}

return 0;

}