求转置后的矩形乱码是怎么回事

Question

/生成 NN 矩阵将矩阵转置后输出。*/
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#define N 3
main()
{
int a[N][N], b[N][N],i,j;
srand(time(NULL));
for (i = 0; i < N; i++)
for (j = 0; j < N; j++)
a[i][j] = rand() % 5;

    printf("原始矩阵：\n");
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < N; j++)
            printf("%4d", a[i][j]);
        printf("\n");
    }
    for (i = 0; j < N; i++)
        for (j = 0; j < N; j++)
            b[i][j] = a[j][i];
    printf("转置后的矩阵：\n");
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < N; j++)
            printf("%4d", b[i][j]);
        printf("\n");
    }

}

Answer 1

这里应该都是i，打错了

修改后：

#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#define N 3
main()
{
int a[N][N], b[N][N],i,j;
srand(time(NULL));
for (i = 0; i < N; i++)
for (j = 0; j < N; j++)
a[i][j] = rand() % 5;

    printf("原始矩阵：\n");
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < N; j++)
            printf("%4d", a[i][j]);
        printf("\n");
    }
    for (i = 0; i < N; i++)
        for (j = 0; j < N; j++)
            b[i][j] = a[j][i];
    printf("转置后的矩阵：\n");
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < N; j++)
            printf("%4d", b[i][j]);
        printf("\n");
    }
}