求大神帮忙用c语言编程 急急急！！

#include

#include

int **cal(int a[][3], int b[][3]);

int main() {

int a[3][3], b[3][3], i, j;

//输入数组a

for (i = 0; i < 3; i++)

for (j = 0; j < 3; j++)

scanf("%d", &a[i][j]);

//输入数组b

for (i = 0; i < 3; i++)

for (j = 0; j < 3; j++)

scanf("%d", &b[i][j]);

//计算矩阵乘积

int **mul = cal(a, b);

//打印

for (i = 0; i < 3; i++)

printf("%d %d %d\n", mul[i][0], mul[i][1], mul[i][2]);

//释放动态数组

for (i = 0; i < 3; i++)

free(mul[i]);

free(mul);

return 0;

}

int **cal(int a[][3], int b[][3]) {

//创建动态数组

int **p = (int **) malloc(3 * sizeof(int *)), i, j;

for (i = 0; i < 3; i++)

p[i] = (int *) malloc(3 * sizeof(int));

//计算

for (i = 0; i < 3; i++)

for (j = 0; j < 3; j++)

p[i][j] = a[i][0] * b[0][j] + a[i][1] * b[1][j] + a[i][2] * b[2][j];

return p;

}

代码效果图

运行效果