以之字形打印给定矩阵
原文:https://www . geesforgeks . org/print-given-matrix-zigzag-form/
给定一个 2D 数组，以之字形打印它。 例:
Input :
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
Output :
1 2 3 4 5 10 9 8 7 6 11 12 13 14 15 20 19 18 17 16
Input :
10 24 32
50 6 17
99 10 11
Output :
10 24 32 17 6 50 99 10 11
C++
// C++ program to print
// matrix in zig-zag form
#include <iostream>
using namespace std;
// Method to print matrix in zig-zag form
void printZigZag(int row, int col, int a[][5])
{
int evenRow = 0; //starts from the first row
int oddRow = 1; //starts from the next row
while (evenRow<row)
{
for (int i=0;i<col;i++)
{
// evenRow will be printed
// in the same direction
cout<<a[evenRow][i] << " ";
}
// Skipping next row so as
// to get the next evenRow
evenRow = evenRow + 2;
if(oddRow < row)
{
for (int i=col-1; i>=0; i--)
{
// oddRow will be printed in
// the opposite direction
cout<<a[oddRow][i] << " ";
}
}
// Skipping next row so as
// to get the next oddRow
oddRow = oddRow + 2;
}
}
// Driver function
int main() {
int r = 3, c = 5;
// Java program to print matrix in zig-zag form
public class GFG
{
// Method to print matrix in zig-zag form
static void printZigZag(int row, int col, int a[][])
{
int evenRow = 0; // starts from the first row
int oddRow = 1; // starts from the next row
while (evenRow < row)
{
for (int i = 0; i < col; i++)
{
// evenRow will be printed in the same direction
System.out.print(a[evenRow][i] + " ");
}
// Skipping next row so as to get the next evenRow
evenRow = evenRow + 2;
if(oddRow < row)
{
for (int i = col - 1; i >= 0; i--)
{
// oddRow will be printed in the opposite direction
System.out.print(a[oddRow][i] + " ");
}
}
// Skipping next row so as to get the next oddRow
oddRow = oddRow + 2;
}
}
public static void main(String[] args)
{
int r = 3, c = 5;
int mat[][] = { {1, 2, 3, 4, 5},
{6, 7, 8, 9, 10},
{11, 12, 13, 14, 15}};
printZigZag(r , c , mat);
}
}
# Python 3 program to print
# matrix in zig-zag form
# Method to print matrix
# in zig-zag form
def printZigZag(row, col, a):
evenRow = 0 # starts from the first row
oddRow = 1 # starts from the next row
while evenRow < row:
for i in range(col):
# evenRow will be printed
# in the same direction
print(str(a[evenRow][i] ),
end = " ")
# Skipping next row so as
# to get the next evenRow
evenRow = evenRow + 2
if oddRow < row:
for i in range(col - 1, -1, -1):
# oddRow will be printed in
# the opposite direction
print(str(a[oddRow][i]),
end = " ")
# Skipping next row so as
# to get the next oddRow
oddRow = oddRow + 2
# Driver Code
r = 3
c = 5
mat = [[1, 2, 3, 4, 5],
[6, 7, 8, 9, 10],
[11, 12, 13, 14, 15]];
printZigZag(r , c , mat)
# This code is contributed
# by ChitraNayal
// C# program to print matrix in zig-zag form
using System;
public class GFG {
// Method to print matrix in zig-zag form
static void printZigZag(int row, int col, int[, ] a)
{
// starts from the first row
int evenRow = 0;
// starts from the next row
int oddRow = 1;
while (evenRow < row) {
for (int i = 0; i < col; i++) {
// evenRow will be printed in
// the same direction
Console.Write(a[evenRow, i] + " ");
}
// Skipping next row so as to get the
// next evenRow
evenRow = evenRow + 2;
if(oddRow < row)
{
for (int i = col - 1; i >= 0; i--)
{
// oddRow will be printed in the
// opposite direction
Console.Write(a[oddRow, i] + " ");
}
}
// Skipping next row so as to get
// the next oddRow
oddRow = oddRow + 2;
}
}
public static void Main()
{
int r = 3, c = 5;
int[, ] mat = { { 1, 2, 3, 4, 5 },
{ 6, 7, 8, 9, 10 },
{ 11, 12, 13, 14, 15 }
};
printZigZag(r, c, mat);
}
}
// This code is contributed by vt_m.
<?php
// PHP program to print
// matrix in zig-zag form
// Method to print matrix
// in zig-zag form
function printZigZag($row, $col, $a)
{
//starts from the first row
$evenRow = 0;
//starts from the next row
$oddRow = 1;
while ($evenRow < $row)
{
for ( $i = 0; $i < $col; $i++)
{
// evenRow will be printed
// in the same direction
echo $a[$evenRow][$i], " ";
}
// Skipping next row so as
// to get the next evenRow
$evenRow = $evenRow + 2;
if($oddRow < $row)
{
for ($i = $col - 1; $i >= 0; $i--)
{
// oddRow will be printed in
// the opposite direction
echo $a[$oddRow][$i], " ";
}
}
// Skipping next row so as
// to get the next oddRow
$oddRow = $oddRow + 2;
}
}
// Driver Code
$r = 3; $c = 5;
$mat = array(array(1, 2, 3, 4, 5),
array(6, 7, 8, 9, 10),
array(11, 12, 13, 14, 15));
printZigZag($r , $c , $mat);
// This code is contributed by m_kit.
?>
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