C/C 数组

创建数组

int number[2]; number[0] = 2;number[1]=3;

int number[]={1,2,3,4,5,6,7};

错误写法：int[] numebr={1,2,3,4,5,6,7};

二维数组

int number[][5] {
    {0,2,4,5,6}
    {1,3,5,7,5}
};

注：行数可以由编译器来数，但列数必须从一开始就确定并声明

获取数组长度

C++

#include<iostream>
int main()
{
    int nums[5] = {1, 2, 3, 45};
    const int size = sizeof(nums)/sizeof(nums[0]);
    printf("%d",size);
    return 0;
}

C

#include<stdio.h>
int main()
{
    int nums[5] = {1, 2, 3, 45};
    const int size = sizeof(nums)/sizeof(nums[0]);
    printf("%d",size);
    return 0;
}