C語言:使用malloc開闢一個3*4的二維數組,並將內容初始化為1-12.

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C語言:使用malloc開闢一個3*4的二維數組,並將內容初始化為1-12.
方法一: 

#include<stdio.h>#include<stdlib.h>int main(){    int(*p)[4] = (int (*)[4])malloc(12 * sizeof(int));//數組指標         for (int i = 0; i < 3; i++)    {        for (int j = 0; j < 4; j++)        {            *(*(p + i) +j) = i * 4 + j + 1 ;        }    }         for ( i = 0; i < 3; i++)    {        for (j = 0; j < 4; j++)        {            printf("%d\t", *(*(p + i) + j));        }    }         printf("\n");    system("pause");    return 0;}

 

      方法二:  
#include<stdio.h>#include<stdlib.h>int main(){    int i = 0;    int j = 0;    int **p = (int **)malloc(3 * sizeof(int));    for (i = 0; i < 3; i++)    {        *(p + i) = (int *)malloc(4 * sizeof(int));    }    for (i = 0; i < 3; i++)    {        for (j = 0; j < 4; j++)        {            p[i][j] = 4 * i + j + 1;        }    }         for (i = 0; i < 3; i++)    {        for (j = 0; j < 4; j++)        {            printf("%d ", *(*(p + i) + j));        }             }    system("pause");    return 0;}

 

 

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