golang 多维数组

Posted 2020-09-17 学无止境，每天进步一小步

具体的题目如下：（就是将多维数组的行列互换）

A multi-dimensional array is an array of arrays. 2-dimensional arrays are the most commonly used. They are used to store data in a tabular manner.

Consider following 2D array, which is of the size $\mathrm{3\times 53\times 5.\; For\; an\; array\; of\; size N\times MN\times M,\; the\; rows\; and\; columns\; are\; numbered\; from 00 to N-1N-1 and\; columns\; are\; numbered\; from 00 to M-1M-1,\; respectively.\; Any\; element\; of\; the\; array\; can\; be\; accessed\; by arr[i][j]arr[i][j] where 0\le i<N0\le i<N and 0\le j<M0\le j<M.\; For\; example,\; in\; the\; following\; array,\; the\; value\; stored\; at arr[1][3]arr[1][3] is 1414.}$

golang 代码如下：

其中定义二维数组没有什么复杂的，在赋值的过程中我们需要先定义一个一维数组 carray := make([]int, column, column)，然后在赋值给外面的数组 array[i] =carray

下来就是字符串拼接和其他的语言不太一样，先定义一个var buffer bytes.Buffer， 然后写数据buffer.WriteString（"ddd"）,最后就是输出 buffer.String()

还有就是一些数值和字符的互相转换用到了包strconv

package main

import "fmt"
import "strconv"
import "bytes"


func main() {
  var row,column int
  fmt.Scanln(&row,&column)
  var array = make([][]int,row,row)
  for i:=0;i<row;i++{
      carray := make([]int, column, column)
      for j:=0;j<column;j++{
      var columnValue string
      fmt.Scan(&columnValue)
      //fmt.Println(columnValue)
      intv,_:= strconv.Atoi(columnValue)
      carray[j] = intv
      }
      array[i] =carray
  }
  //fmt.Println(array)
  var buffer bytes.Buffer 
  for i:=0;i<column;i++{
      buffer.Reset()
      for j:=0;j<row;j++{
      buffer.WriteString(strconv.Itoa(array[j][i])+" ")
      }
      fmt.Println(buffer.String())
  }
}