矩阵中偶数和奇数的频率 · GeeksForGeeks 中文系列教程

# 矩阵中偶数和奇数的频率 > 原文： [https://www.geeksforgeeks.org/find-frequency-even-odd-numbers-matrix/](https://www.geeksforgeeks.org/find-frequency-even-odd-numbers-matrix/) 给定一个阶数为 m * n 的矩阵，则任务是在矩阵中查找偶数和奇数的频率。示例： ``` Input : m = 3, n = 3 { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } Output : Frequency of odd number = 5 Frequency of even number = 4 Input : m = 3, n = 3 { 10, 11, 12 }, { 13, 14, 15 }, { 16, 17, 18 } Output : Frequency of odd number = 4 Frequency of even number = 5 ``` ## CPP ``` // C++ Program to Find the frequency // of even and odd numbers in a matrix #include<bits/stdc++.h> using namespace std; #define MAX 100 // function for calculating frequency void freq(int ar[][MAX], int m, int n) { int even = 0, odd = 0; for (int i = 0; i < m; ++i) { for (int j = 0; j < n; ++j) { // modulo by 2 to check // even and odd if ((ar[i][j] % 2) == 0) ++even; else ++odd; } } // print Frequency of numbers printf(" Frequency of odd number = %d \n", odd); printf(" Frequency of even number = %d \n", even); } // Driver code int main() { int m = 3, n = 3; int array[][MAX] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; freq(array, m, n); return 0; } ``` ## Java ```java // Java Program to Find the frequency // of even and odd numbers in a matrix class GFG { static final int MAX = 100; // function for calculating frequency static void freq(int ar[][], int m, int n) { int even = 0, odd = 0; for (int i = 0; i < m; ++i) { for (int j = 0; j < n; ++j) { // modulo by 2 to check // even and odd if ((ar[i][j] % 2) == 0) ++even; else ++odd; } } // print Frequency of numbers System.out.print(" Frequency of odd number =" + odd + " \n"); System.out.print(" Frequency of even number = " + even + " \n"); } // Driver code public static void main(String[] args) { int m = 3, n = 3; int array[][] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}; freq(array, m, n); } } // This code is contributed by Anant Agarwal. ``` ## Python3 ```py # Python Program to Find the frequency # of even and odd numbers in a matrix MAX=100 # Function for calculating frequency def freq(ar, m, n): even = 0 odd = 0 for i in range(m): for j in range(n): # modulo by 2 to check # even and odd if ((ar[i][j] % 2) == 0): even += 1 else: odd += 1 # print Frequency of numbers print(" Frequency of odd number =", odd) print(" Frequency of even number =", even) # Driver code m = 3 n = 3 array = [ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ] ] freq(array, m, n) # This code is contributed # by Anant Agarwal. ``` ## C# ```cs // C# Program to Find the frequency // of even and odd numbers in a matrix using System; class GFG { //static int MAX = 100; // function for calculating frequency static void freq(int [,]ar, int m, int n) { int even = 0, odd = 0; for (int i = 0; i < m; ++i) { for (int j = 0; j < n; ++j) { // modulo by 2 to check // even and odd if ((ar[i, j] % 2) == 0) ++even; else ++odd; } } // print Frequency of numbers Console.WriteLine(" Frequency of odd number =" + odd ); Console.WriteLine(" Frequency of even number = " + even ); } // Driver code public static void Main() { int m = 3, n = 3; int [,]array = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}; freq(array, m, n); } } // This code is contributed by vt_m. ``` ## PHP ```php <?php // PHP Program to Find the frequency // of even and odd numbers in a matrix $MAX = 100; // function for calculating frequency function freq($ar, $m, $n) { $even = 0; $odd = 0; for($i = 0; $i < $m; ++$i) { for ( $j = 0; $j < $n; ++$j) { // modulo by 2 to check // even and odd if (($ar[$i][$j] % 2) == 0) ++$even; else ++$odd; } } // print Frequency of numbers echo " Frequency of odd number = " , $odd,"\n"; echo " Frequency of even number = " , $even; } // Driver code $m = 3; $n = 3; $array = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9)); freq($array, $m, $n); // This code is contributed by anuj_67\. ?> ``` Output: ``` Frequency of odd number = 5 Frequency of even number = 4 ``` * * * * * *