C语言中的一维数组与二维数组的实现

int arr1[10];
char arr3[10];
float arr4[10];
double arr5[10];

int count = 10;
int arr2[count];

int arr1[10] = {1,2,3};
int arr2[] = {1,2,3,4};
int arr3[5] = {1，2，3，4，5}；
char arr4[3] = {'a',98, 'c'};
char arr5[] = {'a','b','c'};
char arr6[] = "abcdef";

char arr1[] = "abc";
char arr2[3] = {'a','b','c'};

#include <stdio.h>
int main()
{
	int arr[10] = { 0 };//数组的不完全初始化
	//计算数组的元素个数
	int sz = sizeof(arr) / sizeof(arr[0]);
	//对数组内容赋值,数组是使用下标来访问的，下标从0开始。所以：
	int i = 0;//做下标
	for (i = 0; i < 10; i++)
	{
		arr[i] = i;
	}
	//输出数组的内容
	for (i = 0; i < 10; ++i)
	{
		printf("%d ", arr[i]);
	}
	return 0;
}

int arr[10];
int sz = sizeof(arr)/sizeof(arr[0]);

#include <stdio.h>
int main()
{
int arr[10] = {0};
int i = 0;
   int sz = sizeof(arr)/sizeof(arr[0]);
   
for(i=0; i<sz; ++i)
{
printf("&arr[%d] = %p\n", i, &arr[i]);
}
return 0;
}

int arr[3][4];
char arr[3][5];
double arr[2][4];

int arr[3][4] = {1,2,3,4};
int arr[3][4] = {{1,2},{4,5}};
int arr[][4] = {{2,3},{4,5}};

int arr[][4] = {{2,3},{4,5}}; //正确写法
int arr[4][] = {{2,3},{4,5}}; //错误写法

#include <stdio.h>
int main()
{
	int arr[3][4] = { 0 };
	int i = 0;
	for (i = 0; i < 3; i++)
	{
		int j = 0;
		for (j = 0; j < 4; j++)
		{
			arr[i][j] = i * 4 + j;
		}
	}
	for (i = 0; i < 3; i++)
	{
		int j = 0;
		for (j = 0; j < 4; j++)
		{
			printf("%d\t", arr[i][j]); //为了好看加制表符并换两行
		}
		printf("\n\n"); 
	}
	return 0;
}

#include <stdio.h>
int main()
{
	int arr[3][4];
	int i = 0;
	for (i = 0; i < 3; i++)
	{
		int j = 0;
		for (j = 0; j < 4; j++)
		{
			printf("&arr[%d][%d] = %p\n\n", i, j, &arr[i][j]);
		}
	}
	return 0;
}

#include <stdio.h>
int main()
{
int arr[10] = {1,2,3,4,5,6,7,8,9,10};
   int i = 0;
   for(i=0; i<=10; i++)
   {
       printf("%d\n", arr[i]);//当i等于10的时候，越界访问了
   }
return 0;
}