#include <stdio.h>
int bianli(int arr[][3])??? //這里為什么列的長度要有數(shù)值，不填值的話報錯
{
??? int i,j;
??? for(i=0;i<2;i++)
??? {
??????? for(j=0;j<3;j++)???? //改為遍歷三列了
??????? {
??????????? printf("%d,",arr[i][j]);
??????? }
??????? printf("\n");

??? }
??? return 0;
}

int main()
{
??? //使用第一種方式初始化方式聲明并初始化二維數(shù)組arr1
??? int arr1[2][2]={{10,20},{30,40}};
??? //使用第二種方式初始化方式聲明并初始化二維數(shù)組arr2
??? int arr2[2][2];arr2[0][0]=10;arr2[0][1]=20;
??? arr2[1][0]=30;arr2[1][1]=40;
??? int arr3[][3]={1,2,3,4};
??? printf("This is arr1\n");
??? bianli(arr1);
??? printf("This is arr2\n");
??? bianli(arr2);
??? printf("This is arr3\n");
??? bianli(arr3);
??? return 0;
}

輸出結(jié)果為

This is arr1
10,20,30,
40,32,3936256,
This is arr2
10,20,30,
40,10,20,
This is arr3
1,2,3,
4,0,0,

為什么定義兩行兩列的，遍歷兩行三列時第三列的數(shù)值為原來第二行一列的數(shù)？